文档内容
小升初真题混合运算专项练习(有答案)
1.(2017•瑶海区)基本计算:
( ﹣ )×( + )
①428÷[32÷(4+4)]
②127×8÷127×8.
1110÷[56×( ﹣ )]
2.(2017•武胜县)计算. 4.(2017•武胜县)计算.
9080﹣35×26 (108÷25)×(75÷18)
17÷3.4+1.48
3.5×(20.6﹣16.8÷4.8)
÷( ﹣ )×( + )
( ﹣ )×( + )
3÷ ÷ ÷4
×[7﹣4÷( + )].
( + )÷ +
5.(2017•万州区)计算:
9﹣5.4= 780÷26=
3.14×3= 27× =
10÷[ ﹣( ÷ + )].
625﹣199= 10+0.1=
0÷ = 9.42×0.1=
3.(2017•武胜县)计算,能简算的要简算.
﹣ = 0.42=
2004+75×54÷45
1÷ = 1﹣ + =
(0.125×8﹣0.5)×4 6.(2017•桐庐县)计算.
①92×13+28
32%×76.4+1.36×3.2
②4.2÷1.5﹣0.36
× + ÷
③78×
小升初真题混合运算---- 1③16× +4×
④1÷ ﹣ ÷1
④(7.5﹣7.5×0.6)÷4
⑤ ×5÷ ×5
⑤( + ÷3)×
⑥2﹣ ÷
⑥.
10.(2017•顺昌县)脱式计算.(能简算的要简算)
⑦36×( + )
①14×75﹣624÷39
7.(2017•天柱县)脱式计算.
3060÷15﹣25×1.04
② ÷9+ ×
× ÷ +
③ +( ﹣ )÷
( + )×( ÷5)
④ ÷[ ﹣(1﹣ )].
11.(2017•泉州)用递等式计算
×[ ﹣( ﹣ )].
(1)1379+450÷18×40
8.(2017•桃源县)脱式计算.
99×87+87 (2)(3.2÷16+10.8)÷22
18.7﹣3.375﹣6.625
(3) × + ×
5 ×( +0.5)÷2
÷[( ﹣ )÷ ]. (4) × ÷( ﹣ )
12.(2017•硚口区)脱式计算.(友情提醒:有的可以简
9.(2017•苏州)计算下面各题,能简算的要简算 . 算)
①630÷18×24 800﹣608÷32×5
②0.7+3.9+4.3+6.1 3.68﹣3.6×0.2+0.18
小升初真题混合运算---- 248×9.9+48×0.1
(3) × ÷15
(1﹣ )÷0.25×4
(4)( + )÷ ﹣
(6﹣6× )÷12.
(5)3.9×9.77+0.23×3.9
13.(2017•吉水县)脱式计算,能简算的要简算.
97÷1+35.6+0×6
(6) +( ﹣ )× .
1375+450÷15×25
16.(2017•漳州)计算下面各题,怎样简便就怎样计算.
420÷216÷18×17
[4.5+(13× +13× )]÷
25×12.5×32
48× +48× +48×8
94.47﹣(94.47﹣86.555) × + ÷
3.42×76.3+76.3×5.76+9.18×23.7.
40÷[ ×( + )]
14.(2017•洪山区)能简便的要用简便方法计算,写出
主要过程
(1)360+240÷15×28 17.(2017•游仙区)用自己喜欢的方法算
(315+285)÷(315﹣255)
(2)6÷2.4﹣0.3×1.4
(3) ×6+6× 5﹣( ÷ + )
(4)( ﹣0.4)÷ × .
( + ﹣ )×36
15.(2017•凤阳县)用递等式计算,能简算的要简算
(1)43×8﹣420÷15
3.3× +0.75×3.7+75%×3.
(2) +2 + +3
18.(2017•永州)下面各题,怎样简便就怎样计算 .
小升初真题混合运算---- 3405×(20﹣172÷43)
(3) ×29﹣8×
× + ×
(4)( + ﹣ )÷ .
17.31﹣6.15﹣3.85
22.(2017•南县)下面各题,能简算的要简算.(能简算
的要写出主要简算过程)
109×x+109×x
÷[×( ﹣ )].
19.(2017•武昌区)递等式计算: 9.5﹣(4.6+5.8)÷1.3
360﹣225÷15×18
÷ ×
4.72﹣1.16﹣2.84 23.(2017•金堂县)用自己喜欢的方式计算下面各题(要
写出主要的解答过程)
(1)3600﹣800÷40×35
+ ÷ + .
(2)64﹣15.8﹣14.2
20.(2017•田东县)计算下列各题.
860﹣560÷8×7
(3)
(5.9+1.65)÷2.5
(4)
( + )×20÷
(5)
÷[( + )× ].
(6)38÷[2.5×(4.36+3.64)].
21.(2017•瑞安市)
(1)360+24÷15×30
24.(2017•淮南)选择合适的方法计算(要写出主要的计
算过程).
(2)0.25×7.2+2.8÷0.5 6760÷13+17×21
小升初真题混合运算---- 43.33×4.5+4.5×6.67
72×( ﹣ )
28.(2017•丰都县)脱式计算
(384+336)÷15×13
.
(11+30.6)÷16+16.5
25.(2017•河西区)脱式计算.(能简算的要简算)
53×13+21
2﹣ × ﹣
1.65×45+55×1.65
〔1﹣( + )〕÷ .
÷[1﹣( + )].
29.(2017•自流井区)计算,能简便的要简便
26.(2017•河池)用你喜欢的方法计算. (73.6÷0.16+370)×18
25×12﹣850÷17
3.84÷ +5.16×
0.25×99+25%
6÷7﹣
( )×13+4÷17. .
27.(2017•海州区)神机妙算: 30.(2017•雨花区)计算下列各题,能简便的要简便计算
2842÷14+74×3 3618÷45+1620
67﹣67×(23+19)
÷( ﹣ )
200.8×73﹣6.3×2008
3.6×99+3.6
118÷(14+2.5×45)
÷( × )
99﹣97+95﹣93+91﹣89+…+7﹣5+3﹣1
× + ÷
2008÷200820082009.
小升初真题混合运算---- 5⑤ ÷62.5%+ × .
31.(2017•咸安区)灵活计算
①
34.(2017•遂昌县)用递等式计算.
② ①[1﹣( + )]×36
②( + )×36
③
③7.5×4.7+4.7×2.5
④ .
④25.3×12﹣33.46÷0.35
32.(2017•仙游县)神机妙算:
( + )×( ﹣ )
⑤ ×[ ÷(1﹣ )]
× + ÷
⑥ +( ﹣ )÷ .
35.(2017•绍兴县)递等式计算(能简便的要简算)
÷〔( ﹣ )×3〕
+ ÷
( + )×12=
× + ÷
33.(2017•万州区)怎样算简便就怎样算.
①520+2613÷13
(156× ﹣26)×
② ×5×
2012+558÷18×24
③( + )÷ +
3.87+1.44﹣0.87+0.56
④( + ﹣ )÷
35×(1﹣ )÷ .
小升初真题混合运算---- 69﹣ ﹣ =
36.(2017•平坝县)用递等式计算,能简算的要简算.
÷ ﹣ ×
2÷ ﹣ ÷2=
90.5×99+90.5=
13.54﹣6.88﹣3.12
0.125×0.25×32=
( + )÷ + .
40.(2017•金沙县)脱式计算,能简算的要简算
[25﹣( ﹣ )×12]÷5
37.(2017•陕西)13 ×1 +86.6÷ .
× + ×
38.(2017•瑞安市)脱式计算,能简算的要简算.
÷5+
99×101
÷
1.25×32×2.5
4.3×6.7+0.67×67﹣6.7.
( + ﹣ )×18.
41.(2017•建华区)计算下面各题.
657+360÷45×19
39.(2017•乐清市)直接写得数.
﹣ +0.375=
21×
9×(0.5﹣ )=
28.6﹣(12.6+18.4)÷1.6
﹣ =
( )÷ .
12×( + )=
42.(2017•河池)计算下面各题,怎样简便就怎样计算.
× + +
÷2÷ =
小升初真题混合运算---- 7﹣ × ﹣
﹣ + ﹣ =
÷ ﹢ ÷13.
2﹣ ÷ × =
÷[56×( ﹣ )]
43.(2017•河池)计算下面各题,怎样简便就怎样计算.
÷[1÷( ﹣ )]
47.(2017•福州)计算下面各题,能简便的要简便 .
4÷1.25÷8
.
×( ÷ )
44.(2017•汉阳区)选择合适的方法计算.
2929÷29×34﹣1422
+ ÷
÷ ÷
÷〔1﹣( ﹣ )〕
( + ﹣ )×24
× + ×
﹣( + )÷
48.(2017•沿滩区)计算.
8470﹣104×65;
45.(2017•海港区)脱式计算
0.6×(5.3﹣1.7)÷0.9;
( + )÷ +
5.2÷0.8×6+42;
9÷[1﹣( )]
÷( ﹣ )× ;
1.02÷(5+0.4×0.25)
46.(2017•福州)用递等式计算,能简算的要简算
[ ﹣( ﹣ )]÷ .
小升初真题混合运算---- 852.(2017•嘉禾县)用递等式计算下面各题:
49.(2017•新邵县)下面各题,怎样算简便就怎样算
(15﹣14× )×
21×( )
53.(2017•滑县)怎样简便就怎样算
+ ×3
50.(2017•厦门)计算:
(1)( + )÷ +
5﹣ ﹣0.125
(2)[1﹣( + )]÷
÷ + ×
(3) × ﹣ × .
[ ﹣( ﹣ )]÷ .
51.(2017•龙湾区)用递等式计算,能简便的要用简便方 54.(2017•福州)计算下列各题.(能简算的写出简算过
法计算. 程)
÷ ×5 (1)4.27× +4.73÷8+ ,
(2)(2.3+2.3+2.3+2.3)×2.5,
÷9+ ×
55.(2017•福安市)下面各题怎么简便怎么算.
×( ﹣ )÷ ;
5×( ﹣ )÷
78÷[32×(1﹣ )+144];
48×( + ﹣ )
小升初真题混合运算---- 9× ﹣ × ;
(4) × + ×
0.32×2.5×0.125.
÷[( + )× ]
(5)
56.(2017•东莞)选择你喜欢的方法进行计算:
×27﹣
(6) ﹣ ﹣ ÷ .
÷(1﹣ )×
59.(2017•北海) .
9 ×4.25+4 ×
60.(2017•重庆)计算下面各题,能简算和要简算.
( + )÷
(6 ﹣3 )÷(13+11 )
×( + )
57.(2017•毕节地区)计算下面各题,要写出计算的主要
过程
6.28+5.74+3.72+5.26
61.(2017•康县)计算.(能简算的要简算 )
.
1.9﹣1.9×( )
58.(2017•巴中)计算下面各题,注意使用简便运算.
÷
(1) × ÷
×[1﹣( ﹣ )]
(2) ÷ ÷
48×
(3)(15﹣14× )×
小升初真题混合运算----100.6+32×0.25﹣6
85×
÷[( + )× ].
÷23+ × .
65.(2017•城厢区)计算下面各题,能简算的要简算
①96×(72﹣14.4)÷3.6
62.(2017•姜堰市)计算下面各题,能简便计算的用简便
方法计算.
②( + + )×12
4.82﹣5.2÷0.8×0.6
[ ﹣( ﹣ )]÷ ③ ×36+36×
× + × ④[ ﹣( ﹣ )]÷ .
66.(2017•温江区)计算.
12.3×99 (1)22.7﹣1.8+17.3﹣18.2
(2)3899+3737÷37
57.5﹣14.25﹣15
(3)385×6÷385×6
3.2×12.5×0.25.
(4)
63.(2017•丰润区)用最喜欢的方法计算
12.5×38×0.8
(5)
(8.5﹣4)×(0.32÷1.6)
(6)38.4×13+30.8×26.
6.5×4.6+6.5×15.4 67.(2017•满洲里市)
计算下面各题,能简算的要简算.
6.8﹣1.36﹣0.64
÷[ ].
(2.5×73)×0.4
64.(2017•东城区)脱式计算.
小升初真题混合运算----11② ②
+ ﹣ +
③(6.9﹣3.15)÷0.3×0.8④÷(×)﹣1.
0.25+ + +
④ ÷( × )﹣1 .
32.5×1.7+32.5×9.3﹣32.5.
68.(2017•建华区)计算下面各题. 71.(2017•徐闻县)计算下列各题,能简算的要简算
13.5﹣(6.9+6.1)÷2.6
(1)( )×36
15×
(2)5.28﹣(2.56+0.44)+1.72
573+900÷36×15
(3)
(4)25×12.5×32
( )÷ + .
(5)(5﹣4.75)÷(2×2.5﹣3)
69.(2017•邗江区)脱式计算.
(2.8+4.6)×(2.6﹣2.)
(6)27÷7+43×(1﹣ )
0.25×(32+64)÷0.6 72.(2017•霞浦县)怎样算简便就怎样算.
20.3×16﹣4560÷15
÷[ ×( ﹣ )]
2.5×0.125×32
×[1﹣( ﹣ )]. 6.3× .
70.(2017•云龙县)用递等式计算.
①3.6﹣2.8+6.4﹣7.2
小升初真题混合运算----1273.(2017•双阳区)
(1)40.5÷0.81﹣16×2.4 76.(2017•龙湾区)用递等式计算,怎样简便就怎样算
(1)3.7﹣2.2+7.3﹣7.8
(2) ÷[ ×( ﹣ )
(2)375+450÷18×25
(3)6.72÷1.2
(3)2.9× +1.1×
(4)18.1﹣5.7﹣4.3+1.9
(4) ÷( ﹣ )
(5)3.8×4.2+38×0.58
77.(2017•龙海市)选择合适的方法,计算下面各题 .
18.7﹣4.375﹣6.625
(6)1.25×9﹣1.25.
74.(2017•曲周县)选择你喜欢的方法计算. 920÷40﹢23×50
3.6﹣2.8+6.4﹣7.2
6.3× +13.7÷15 12×( + ﹣ )
÷( + )× 4.4× +3.6÷1 +0.75×2
×17+ ×23
78. (2017•乐清市)
(1)4.5×9.9+0.1;
75.(2017•萝岗区)计算.(写出解答过程,能应简便方
法的要用简便方法)
(1)(0.125×8﹣0.5)×4
(2)16﹣ + ﹣ ;
(2)( + )÷ ﹣
(3)1.25×2.5×3.2;
(3)907+907×9﹣900 (4)8.1÷(9﹣6.3×1.4);
(5)59+59×13+14×41.
(4)9÷[ +( ﹣ )]
小升初真题混合运算----1379.(2016•重庆)脱式计算.
30.5﹣40÷8×2.4
83.(2016•资中县)用递等式计算(能简算的请简算 )
①7.6﹣4.8+8.4﹣5.2
1.6× + ÷2.4
②4×0.8×2.5×1.25
8.5+[( ﹣0.005×700)÷ ]
[2﹣( ﹣1.5)÷ ]× . ③ × + ÷
80.(2016•宜昌)用自己喜欢的方法计算.
205﹣105×12÷45
④1375﹣375÷15×18
1.05×(3.8﹣0.8)÷6.3
⑤1.05×(3.8﹣0.8)÷6.3
( + )÷
⑥ ×〔( ﹣ )÷ 〕
( + )÷50%
84.(2016•武进区)用递等式计算:
①0.6﹣0.2×1.9÷7.6;
884÷34+17×21
②5÷ ﹣ × ;
3.75×(1.2﹣ )+ .
③1.02÷(5+0.4×0.25);
81.(2016•淇滨区)计算:
45.78+45.78×99
④ ÷( + )× ;
3.6﹣2.8+7.4﹣7.2
⑤3÷ ×( ﹣ ).
×67+33× .
85.(2016•汕头)混合运算.(能简便的要写简便过程)
①4.5×8.8﹣2.2×4.5﹣4.5
82.(2016•成都)1÷2.5+2.5×0.4+1.
小升初真题混合运算----14①730﹣240÷15×16
②38 ﹣15.4+0.125﹣4.6
②[2.06﹣(1.73﹣0.29)]×1.5
③
③ ÷[( + )× ]
④ .
④6.8+2.37+7.63+4.2
86.(2016•邗江区)用递等式计算,能简算的要简算
(1)18﹣10.4÷(6.2﹣4.9)
⑤ ×17÷9+3÷8× .
(2)
89.(2016•浦东新区)
(1)13.72﹣1.65﹣2.35
(3)2﹣
(2)2.4+3.6÷1.2×0.2
(4)3.6÷0.4+1.3×5
(3)(12.5+1.25)×0.8
(5)[6.85﹣(0.75+0.2)]÷0.5
(4)5.4×7.2+2.8×5.4
(6) ÷[56×( )].
(5)2÷(1.2﹣0.4×2.5)
87.(2016•广西)灵活计算下面各题
(1)54.75﹣5.25﹣14.75
(6)0.3×[(13.4﹣10)÷0.5+1.5].
(2)16.4÷(4.3×2﹣0.4) 90.(2016•长汀县)用递等式计算(能简算的要用简便方
法计算).
①20﹣ ﹣
(3)1.25×32
②9.07×99+9.07
(4) ×[1﹣( ﹣ )]
③ + × ÷2
88.(2016•大足县)脱式计算(其中④、⑤两小题必须简
算).
小升初真题混合运算----15④2.3+3.91÷(22﹣19.7)
⑤ ×[ ﹣( ﹣ )].
小升初真题混合运算----163.(1)2004+75×54÷45,
参考答案:
=2004+4050÷45,
1.①428÷[32÷(4+4)], =2004+90,
=428÷[32÷8], =2094;
=428÷4, (2)(0.125×8﹣0.5)×4,
=107; =(1﹣0.5)×4,
②127×8÷127×8, =0.5×4,
=127÷127×8×8, =2;
=8×8, (3)32%×76.4+1.36×3.2,
=64 =32%×76.4+13.6×0.32
2.(1)9080﹣35×26, =0.32×(76.4+13.6),
=9080﹣910, =0.32×90,
=8170; =28.8;
(2)17÷3.4+1.48,
(4) × + ÷ ,
=5+1.48,
=6.48;
= + ,
(3) ÷( ﹣ )×( + ),
= ;
= ÷ × ,
(5)( ﹣ )×( + ),
= ×( × ),
= × ,
= × ,
= ;
= ;
(6)1110÷[56×( ﹣ )],
(4)3÷ ÷ ÷4,
=1110÷[56× ﹣56× ],
=9× ÷4,
=1110÷[24﹣21],
=12÷4, =1110÷3,
=3; =370
(5)( + )÷ + ,
4.(1)(108÷25)×(75÷18),
= × , = × ,
=18;
= + ,
(2)3.5×(20.6﹣16.8÷4.8),
=3.5×(20.6﹣3.5),
= ;
=3.5×17.1,
=59.85;
(6)10÷[ ﹣( ÷ + )],
(3)( ﹣ )×( + ),
=10÷[ ﹣( + )],
= × ,
=10÷[ ﹣ ],
= ;
=10÷ ,
(4) ×[7﹣4÷( + )],
=81
小升初真题混合运算----17= ×[7﹣4÷ ], ⑥2﹣ ÷
= ×[7﹣4× ], =2﹣ ,
= ×[7﹣5], = ;
= ×2, ⑦36×( + )
= . =36× +36× ,
5.9﹣5.4=3.6, 780÷26=30, =6+24,
=30.
3.14×3=9.42, 27× =15,
7.(1)3060÷15﹣25×1.04
625﹣199=426, 10+0.1=10.1, =204﹣26,
=178;
0÷ =0, 9.42×0.1=0.942,
(2) × ÷ +
﹣ = , 0.42=0.16,
= × + ,
1÷ = , 1﹣ + = ;
= + ,
6.①92×13+28
=1196+28,
= ;
=1224;
②4.2÷1.5﹣0.36
(3)( + )×( ÷5)
=2.8﹣0.36,
=2.44;
= × × ,
③78×
= ;
=(79﹣1)× ,
(4) ×[ ﹣( ﹣ )].
=79× ﹣1× ,
= ×[ + ﹣ ],
=3﹣ ,
= × ,
=2 ;
= .
④1÷ ﹣ ÷1
=4﹣ ,
8.(1)99×87+87,
=(99+1)×87,
=3 ;
=100×87,
=8700;
⑤ ×5÷ ×5
(2)18.7﹣3.375﹣6.625,
=18.7﹣(3.375+6.625),
= ×5×5,
=18.7﹣10,
=1×5×5, =8.7;
=25;
(3)5 ×( +0.5)÷2 ,
小升初真题混合运算----18=5 × ÷2 , = ,
=1
=6 ÷2 ,
10.①14×75﹣624÷39
=3; =1050﹣16,
=1034;
(4) ÷[( ﹣ )÷ ],
② ÷9+ ×
= ÷[ ÷ ],
= × + × ,
= ÷ ,
=( + )× ,
= .
= × ,
9.①630÷18×24,
=35×24,
= ;
=840;
②0.7+3.9+4.3+6.1,
③ +( ﹣ )÷
=(0.7+4.3)+(6.1+3.9),
=5+10,
= + × ,
=15;
③16× +4× , = + ,
=(16+4)× , = ;
=20× , ④ ÷[ ﹣(1﹣ )].
=8;
= ÷[ ﹣ ],
④(7.5﹣7.5×0.6)÷4,
=(7.5﹣4.5)÷4,
= ,
=3÷4,
=0.75;
= .
⑤( + ÷3)× ,
11.(1)1379+450÷18×40,
=1379+25×40,
=( + × )× ,
=1379+1000,
=2379;
=( + )× ,
(2)(3.2÷16+10.8)÷22,
=(0.2+10.8)÷22,
= ,
=11÷22,
=0.5;
= ;
(3) × + × ,
⑥ [ ( )],
=( + )× ,
= ×[ ÷( )],
=1× ,
= ×[ ],
= ;
= [ ],
小升初真题混合运算----19(4) × ÷( ﹣ ), =14.25× ,
=8.55;
= × ÷ ,
(4)48× +48× +48×8
= × ×12,
=( + +8)×48,
= ×12× ,
=9×48,
=432;
=3× ,
(5)94.47﹣(94.47﹣86.555)
=94.47﹣94.47+86.555,
= .
=0+86.555,
12.(1)800﹣608÷32×5, =86.555;
=800﹣19×5, (6)3.42×76.3+76.3×5.76+9.18×23.7
=800﹣95, =(3.42+5.76)×76.3+9.18×23.7,
=705; =9.18×76.3+9.18×23.7,
(2)3.68﹣3.6×0.2+0.18, =(76.3+23.7)×9.18,
=3.68﹣0.72+0.18, =100×9.18,
=2.96+0.18, =918
=3.14; 14.(1)360+240÷15×28,
(3)48×9.9+48×0.1, =360+16×28,
=48×(9.9+0.1), =360+448,
=48×10, =808;
=480; (2)6÷2.4﹣0.3×1.4,
=2.5﹣0.42,
(4)(1﹣ )÷0.25×4,
=2.08;
=0.25÷0.25×4,
(3) ×6+6× ,
=1×4,
=4;
=( + )×6,
(5)(6﹣6× )÷12,
=1×6,
=(6﹣4)÷12, =6;
=2÷12,
(4)( ﹣0.4)÷ × ,
= .
= ÷ × ,
13.(1)97÷1+35.6+0×6
=97+35.6+0,
= × ,
=132.6;
(2)1375+450÷15×25
=
=1375+30×25,
=1375﹣750, 15.(1)43×8﹣420÷15,
=625; =344﹣28,
=316;
(3)[4.5+(13× +13× )]÷
(2) +2 + +3 ,
=[4.5+(13× ×2)]÷ ,
=( + )+(3 +2 ),
=[4.5+9.75]÷ ,
=1+6,
=7;
小升初真题混合运算----20(3) × ÷15, (4)40÷[ ×( + )],
= × , =40÷[ × ],
= ; =40÷ ,
=80
(4)( + )÷ ﹣ ,
17.(1)(315+285)÷(315﹣255),
= × ﹣ ,
=600÷60,
=10;
= ﹣ ,
(2)5﹣( ÷ + ),
= ;
=5﹣(4 ),
(5)3.9×9.77+0.23×3.9
=3.9×(9.77+0.23),
=5﹣4﹣ ,
=3.9×10,
=39;
= ;
(6) +( ﹣ )× ,
(3)( + ﹣ )×36,
= + × ,
= ×36+ ×36﹣ ×36,
= + ,
=9+6﹣12,
=3;
= .
(4)3.3× +0.75×3.7+75%×3,
16.(1)420÷216÷18×17,
=(3.3+3.7+3)×0.75,
= ÷18×17,
=10×0.75,
=7.5
= ×17,
18.①405×(20﹣172÷43),
= ;
=405×16,
(2)25×12.5×32, =6480;
=25×12.5×8×4,
② × + × ,
=(25×4)×(12.5×8),
=100×100,
= ×( + ),
=10000;
(3) × + ÷ , = ;
③17.31﹣6.15﹣3.85,
= × + × ,
=17.31﹣(6.15+3.85),
=17.31﹣10,
=( + )× ,
=7.31.
=1× , ④ ÷[ ×( ﹣ )],
= ; = ÷[ × ],
小升初真题混合运算----21= × , = ,
=3
= .
19.(1)360﹣225÷15×18, 21.(1)360+24÷15×30,
=360﹣15×18,
=360+ ×30,
=360﹣270,
=90; =360+48,
=408;
(2) ÷ × ,
(2)0.25×7.2+2.8÷0.5,
=1.8+5.6,
= × ,
=7.4;
= ; (3) ×29﹣8× ,
(3)4.72﹣1.16﹣2.84,
= ×(29﹣8),
=4.72﹣(1.16+2.84),
=4.72﹣4,
= ×21,
=0.72;
=9;
(4) + ÷ + ,
(4)( + ﹣ )÷ ,
= + + ,
=( + ﹣ )×24,
= + + ,
= ×24+ ×24﹣ ×24,
=1+ ,
=20+21﹣10,
=41﹣10,
=1 .
=31
20.860﹣560÷8×7
=860﹣70×7,
=860﹣490, 22.(1)109×x+109×x,
=370; =(109+109)×x,
(5.9+1.65)÷2.5 =218x;
=7.55÷2.5, (2)9.5﹣(4.6+5.8)÷1.3,
=3.02 =9.5﹣10.4÷1.3,
=9.5﹣0.8,
( + )×20÷
=8.7;
=( ×20+ ×20) , (3) ,
=(15+16)× , = ÷ + ,
=31× , = + ,
=21;
= .
÷[( + )× ].
23.(1)3600﹣800÷40×35,
=3600﹣20×35,
= ÷[ × ],
=3600﹣700,
=2900;
小升初真题混合运算----22(2)64﹣15.8﹣14.2, 25.(1)53×13+21,
=64﹣(15.8+14.2), =689+21,
=64﹣30, =710;
=34; (2)1.65×45+55×1.65,
=1.65×(45+55),
(3) ,
=1.65×100,
=165;
=(40﹣27)× ,
(3) ÷[1﹣( + )],
=13× ,
= ÷[1﹣ ],
=9;
(4) , = ,
= ×36﹣ ×36+ ×36, = .
=15﹣6+14, 26.(1)25×12﹣850÷17,
=9+14, =300﹣50,
=23; =250;
(2)0.25×99+25%,
(5) ,
=0.25×(99+1),
=0.25×100,
=(18﹣5+1)× ,
=25;
=14× , (3)6÷7﹣ ,
=9;
= ﹣ ,
(6)38÷[2.5×(4.36+3.64)],
=38÷[2.5×8],
= ;
=38÷20,
=1.9
(4)( )×13+4÷17,
24.(1)6760÷13+17×21,
=520+357,
= ×13+ ×13+4÷17,
=877;
(2)3.33×4.5+4.5×6.67
= + + ,
=(3.33+6.67)×4.5,
=10×4.5,
= +( + ),
=45;
(3)( + )÷( ﹣ ) = +1,
= , =2 .
27.(1)2842÷14+74×3
= ;
=2848÷7÷2+74×3,
=203+222,
(4)
=425;
=12÷[ × ], (2) ÷( ﹣ )
=12÷ , = ×12,
=48.
小升初真题混合运算----23=10 ; = ÷ ,
(3)3.6×99+3.6
= .
=(99+1)×3.6,
=100×3.6, 29.(1)(73.6÷0.16+370)×18,
=360; =(460+370)×18,
=830×18,
(4) ÷( × )
=14940;
= × , (2)3.84÷ +5.16× ,
= ; =3.84× +5.16× ,
(5) × + ÷ =(3.84+5.16)× ,
= × + × , =9× ,
=12;
=( + )× ,
(3) ,
=1× ,
=7.35﹣ ﹣0.35﹣ ,
= ;
=(7.35﹣0.35)﹣( + ),
(6)72×( ﹣ )
=7﹣ ,
=72× ﹣72× ,
=6 ;
=40﹣30,
=10
(4)2.5×( + + + ),
28.(1)(384+336)÷15×13,
=720÷15×13,
=2.5×( ×4),
=48×13,
=624;
=(2.5×4)× ,
(2)(11+30.6)÷16+16.5,
=41.6÷16+16.5,
=10× ,
=2.6+16.5,
=19.1;
= .
(3)2﹣ × ﹣ ,
30.(1)3618÷45+1620,
=80.4+1620,
=2﹣ ﹣ ,
=1700.4;
(2)67﹣67×(23+19),
=2﹣( + ),
=67×(1﹣23﹣19),
=2﹣1, =67×(﹣41),
=2; =﹣2747;
(3)200.8×73﹣6.3×2008,
(4)[1﹣( + )]÷ ,
=2008×7.3﹣6.3×2008,
=(7.3﹣6.3)×2008,
=[1﹣ ]÷ ,
=1×2008,
=2008;
小升初真题混合运算----24(4)118÷(14+2.5×45),
32. (1)( + )×( ﹣ ),
=118÷(14+112.5),
=118÷126.5,
= × ,
= ;
= ;
(5)99﹣97+95﹣93+91﹣89+…+7﹣5+3﹣1,
=2+2+…2+2,
(2) × + ÷ ,
=2×25,
=50.
= × + × ,
(6)2008÷200820082009= ;
= ×( + ),
31.(1) ,
= ×1,
= ﹣ + ,
= ;
=( + ) ,
(3) ÷[( ﹣ )×3],
=1﹣ ,
= ÷[ ×3],
= ;
= ÷ ,
(2)75 ﹣25× ,
= ;
=75× ﹣25× ,
(4)( + )×12,
=(75﹣25)× ,
= ×12+ ×12,
=50× ,
=4+9,
=30; =13
33.①520+2613÷13,
(3) ,
=520+201,
=721;
= ×14+ ×14﹣ ,
② ×5× ,
=5+(14﹣1)× ,
= × ×5,
=5+13× ,
= ×5,
=5+4,
=9;
= ;
(4) ,
③( + )÷ + ,
= ÷ + ,
= + ,
= + ,
= + ,
=
=1;
小升初真题混合运算----25④( + ﹣ )÷ , = ×5,
=( + ﹣ )×42, =4 ;
= ×42+ ×42﹣ ×42, ⑥ +( ﹣ )÷ ,
=28+24﹣7,
= +( ﹣ )×2,
=52﹣7,
=45;
= + ×2,
⑤ ÷62.5%+ × ,
= + ,
= × + × ,
= .
=( + )× ,
35.(1) + ÷ ,
=1× ,
= + ,
=
= ;
34.①[1﹣( + )]×36,
(2) × + ÷ ,
=[1﹣( + )]×36,
= × + × ,
=[1﹣ ]×36,
= ×( + ),
= ×36,
= ×1,
= ;
= ;
②( + )×36,
(3)(156× ﹣26)× ,
=36× ,
=(48﹣26)× ,
=8+21,
=29;
=22× ,
③7.5×4.7+4.7×2.5,
=4.7×(7.5+2.5), =16;
=4.7×10, (4)2012+558÷18×24,
=47; =2012+31×24,
④25.3×12﹣33.46÷0.35, =2012+744,
=303.6﹣95.6, =2756;
=208; (5)3.87+1.44﹣0.87+0.56,
=(3.67﹣0.87)+(1.44+0.56),
⑤ ×[ ÷(1﹣ )],
=3﹣2,
=1;
= ×[ ÷ ],
(6)35×(1﹣ )÷ ,
= [ ],
=35× ÷ ,
小升初真题混合运算----26=9+6﹣3,
=20 ,
=15﹣3,
=48 =12
﹣ +0.375= ,
39.
36.(1) ÷ ﹣ × ,
9×(0.5﹣ )=1.5,
=4﹣ ,
﹣ = ,
=3 ;
12×( + )=5,
(2)13.54﹣6.88﹣3.12,
=13.54﹣(6.88+3.12), ÷2÷ = ,
=13.54﹣10,
=3.54;
9﹣ ﹣ =8
(3)( + )÷ + ,
2÷ ﹣ ÷2=2 ,
= ,
90.5×99+90.5=9050
0.125×0.25×32=1.
= ,
40. (1)[25﹣( ﹣ )×12]÷5 ,
=2
=[25﹣ ×12]÷5 ,
37.13 ×1 +86.6÷
=(25﹣3)÷5
=13.4× +86.6× ,
=22 ,
=(13.4+86.6)×1.25,
=100×1.25, =4;
=125
(2) × + × ,
38.(1) ÷5+ ,
= × + × ,
=( )× ,
=( + )× ,
= ,
=1× ,
= ;
= ;
(2) ÷ ,
(3)99×101,
=99×(100+1),
= [ ],
=99×100+99×1,
=9900+99,
= ,
=9999;
(4)1.25×32×2.5,
= ;
=1.25×(4×8)×2.5,
=(1.25×8)×(2.5×4),
(3)( + ﹣ )×18,
=10×10,
=100;
= ×18+ ×18﹣ ×18,
(5)4.3×6.7+0.67×67﹣6.7,
小升初真题混合运算----27=4.3×6.7+6.7×6.7﹣6.7,
= ;
=(4.3+6.7﹣1)×6.7,
=10×6.7,
(3) ÷ ﹢ ÷13,
=67
41.(1)657+360÷45×19,
= × + × ,
=657+8×19,
=657+152,
=( + )× ,
=809;
(2)21× , =1× ,
=21× × × , =
=(21× )×( × ), 43.(1) ,
=8× , =35× ,
= ; =20× ,
(3)28.6﹣(12.6+18.4)÷1.6, =48;
=28.6﹣31÷1.6,
(2) ,
=28.6﹣19.375,
=9.225;
=(48﹣26)× ,
(4)( )÷ ,
=22× ,
= ÷ ,
=16;
=2+ , (3) ,
=2 . = × + × ,
42.(1) × + + , = ×( + ),
= + + , = ×1,
= + + , =
44.(1)2929÷29×34﹣1422,
=2+ ,
=101×34﹣1422,
=3434﹣1422,
=2 ;
=2012;
(2) ﹣ × ﹣ , (2) ÷ ÷ ,
= ﹣ ﹣ , = ( ),
= ﹣( + ), = ,
= ﹣1, =2 ;
小升初真题混合运算----28(3)( + ﹣ )×24, = ;
= ×24+ ×24﹣ ×24, (3) ÷[56×( ﹣ )],
=2+6﹣8,
= ÷[56× ﹣56× ],
=8﹣8,
=0;
= ÷[24﹣21],
(4) ﹣( + )÷ ,
= ÷3,
= ,
= × ,
= ,
= ;
=
(4) ÷[1÷( ﹣ )],
45.(1)( + )÷ + ,
= ÷[1÷ ],
= ,
= ÷ ,
= ,
= × ,
= ;
= ;
(2)9÷[1﹣( )],
47.(1)4÷1.25÷8,
=4÷(1.25×8),
=9÷[1﹣ ],
=4÷10,
=0.4;
=9÷ ,
(2) ×( ÷ ),
=27;
(3)1.02÷(5+0.4×0.25),
= × ,
=1.02÷(5+0.1),
=1.02÷5.1,
= ;
=0.2
46.(1) ﹣ + ﹣ , (3) + ÷ ,
= + ﹣( + ), = + ,
=2;
= ﹣1,
(4) ÷[1﹣( ﹣ )],
= ;
= ÷[1﹣ ],
(2)2﹣ ÷ × ,
= ÷ ,
=2﹣ × × ,
= ;
=2﹣ ,
(5) × + × ,
小升初真题混合运算----29= ×( + ), = × ,
= ×1, = ;
= (3)4÷ ﹣ ÷4,
48.(1)8470﹣104×65,
=5﹣ ,
=8470﹣(100+4)×65,
=8470﹣100×65﹣4×65,
=4 ;
=8470﹣6500﹣260,
=1710;
(4) ÷[( ﹣ )× ],
(2)0.6×(5.3﹣1.7)÷0.9,
=0.6×3.6÷0.9,
= ÷[ × ],
=0.6×(3.6÷0.9),
=0.6×4,
= ÷ ,
=2.4;
(3)5.2÷0.8×6+42,
=
=39+42,
=81;
50.(1)( + )÷ +
(4) ÷( ﹣ )× ,
= × + ,
= ÷ × ,
= ,
= × × ,
=2;
= ; (2)[1﹣( + )]÷
(5)[ ﹣( ﹣ )]÷ , =[1﹣ ]× ,
=[ ﹣ ]÷ , = × ,
= × , = ;
= . (3) × ﹣ ×
49.(1)2﹣ ÷ ﹣ , = ,
=2﹣ ﹣ , = .
=2﹣( + ), 51.(1) ÷ ×5,
=2﹣1,
= ×5,
=1;
(2) × ﹣ ÷ , = ;
= × ﹣ × , (2) ÷9+ × ,
=( ﹣ )× , = × + × ,
小升初真题混合运算----30=3+14,
= ×( + ),
=17
= ×1, 53.(1) + ×3,
= ; = + ,
(3)5×( ﹣ )÷ , = ;
=5× ÷ , (2)5﹣ ﹣0.125,
=5﹣(0.875+0.125),
= × ,
=5﹣1,
=4;
= ;
(3) ÷ + × ,
(4)48×( + ﹣ ),
= × + × ,
=48× +48× ﹣48× ,
=( + )× ,
=16+12﹣24,
=28﹣24,
=1× ,
=4
52.(1)10÷ + ×4, = ;
=10× + ×4, (4)[ ﹣( ﹣ )]÷ ,
=18+ , =[ ﹣ ]÷ ,
=18 ; = ÷ ,
(2) × + × , =
= ×( + ), 54.(1)4.27× +4.73÷8+ ,
= ×1, =4.27× +4.73× + ,
= ; =(4.27+4.73+1)× ,
(3)(15﹣14× )× , =10× ,
=(15﹣8)× , = ;
(2)(2.3+2.3+2.3+2.3)×2.5,
=7× ,
=2.3×4×2.5,
=2.3×(4×2.5),
= ;
=2.3×10,
=23
(4)21×( ),
55.(1) ×( ﹣ )÷
=21× ×21,
小升初真题混合运算----31= × ×2, =
= ; 57.(1)(1﹣ ×70)÷ ,
(2)78÷[32×(1﹣ )+144] =(1﹣ )× ,
=78÷[32× +144], = × ,
=78÷[12+144],
= ;
=78÷156,
=0.5;
(2) ÷[ ×( + )],
(3) × ﹣ ×
= ÷[ × ],
=( ﹣ )× ,
= ÷ ,
= × ,
= × ,
= ;
=
(4)0.32×2.5×0.125
=0.4×0.8×2.5×0.125,
58.(1) × ÷ ,
=(0.4×2.5)×(0.8×0.125),
=1×0.1,
= × × ,
=0.1
56.(1) ×27﹣ = ;
=(27﹣1)× , (2) ÷ ÷ ,
=26× , = × × ,
=18;
= ;
(2) ÷(1﹣ )×
(3)(15﹣14× )× ,
= ÷ × ,
=(15﹣8)× ,
= ;
=7× ,
(3)9 ×4.25+4 ×
= ;
=9 ×4.25+4.25× ,
(4) × + × ,
=(9 + )×4.25,
=( + )× ,
=10×4.25,
=42.5;
=1× ,
(4)(6 ﹣3 )÷(13+11 )
= ;
= ÷ ,
小升初真题混合运算----32(5) ÷[( + )× ], = ÷ ,
=1;
= ÷[ × ],
(3) ×[1﹣( ﹣ )],
= ÷ ,
= ×[1﹣ ],
= × ,
= × ,
=3;
(6) ﹣ ﹣ ÷ , = ;(4)48×
= ﹣ ﹣ × , =48× +48× ﹣48× ,
=12+8﹣4,
= ﹣ ﹣ ,
=16;
= ﹣( + ), (5)85× ,
= ﹣1, =(86﹣1)× ,
= =86× ﹣
59.2.7× ﹣ 0.35=9﹣2 =6 =85﹣
60.(1)( + )÷ , =84 ;
= × , (6) ÷23+ ×
= ; = × + × ,
(2) ×( + ), =( + )×
= × , =1× ,
= ; = .
(3)6.28+5.74+3.72+5.26, 62.(1)4.82﹣5.2÷0.8×0.6,
=(6.28+3.72)+(5.74+5.26), =4.82﹣6.5×0.6,
=10+11, =4.82﹣3.9,
=21; =0.92;
61.(1)1.9﹣1.9×( ), (2)[ ﹣( ﹣ )]÷ ,
=1.9﹣1.9×0,
=[ ﹣ ]÷ ,
=1.9﹣0,
=1.9;
= ÷ ,
(2)[1﹣( ﹣ )]÷ ,
= ;
=[1﹣ ]÷ ,
(3) × + × ,
小升初真题混合运算----33=( + )× , (2) ÷[( + )× ],
=1× , = ÷[ × ],
= ; = ÷ ,
(4)12.3×99, =5.
=12.3×(100﹣1), 65.①96×(72﹣14.4)÷3.6,
=12.3×100﹣12.3×1, =96×57.6÷3.6,
=1230﹣12.3, =1536;
=1217.7;
②( + + )×12,
(5)57.5﹣14.25﹣15 ,
= ×12+ ×12+ ×12,
=57.5﹣(14.25+15 ),
=6+4+3,
=57.5﹣30, =13;
=27.5;
③ ×36+36× ,
(6)3.2×12.5×0.25,
=8×0.4×12.5×0.25,
=( + )×36,
=(8×12.5)×(0.4×0.25),
=100×0.1, =1×36,
=10 =36;
63.(1)12.5×38×0.8,
④[ ﹣( ﹣ )]÷ ,
=(12.5×0.8)×38,
=10×38,
=[ ﹣ ]÷ ,
=380;
(2)(8.5﹣4)×(0.32÷1.6),
= × ,
=4.5×0.2,
=0.9;
= .
(3)6.5×4.6+6.5×15.4, 66. (1)22.7﹣1.8+17.3﹣18.2,
=6.5×(4.6+15.4), =(22.7+17.3)﹣(1.8+18.2),
=6.5×20, =40﹣20,
=130; =20;
(2)3899+3737÷37,
(4) ÷[ ÷(1﹣ )],
=3899+101,
=4000;
= ÷[ ÷ ],
(3)385×6÷385×6,
=(385÷385)×(6×6),
= ÷[ × ],
=1×36,
=36;
= ÷ ,
(4) ,
= × ,
= + × ,
=
= + ,
64.(1)0.6+32×0.25﹣6,
=0.6+8﹣6,
= ;
=2.6;
小升初真题混合运算----34(3)573+900÷36×15,
(5) ,
=573+25×15,
=573+375,
=8×4×1.25× ,
=948;
=(8×1.25)×(4× ), (4)( )÷ + ,
=10×1,
= × + ,
=10;
(6)38.4×13+30.8×26,
= + ,
=38.4×13+61.6×13,
=(38.4+61.6)×13,
=
=100×13,
=1300 69.①(2.8+4.6)×(2.6﹣2),
67.①6.8﹣1.36﹣0.64 =7.4×0.6,
=6.8﹣(1.36+0.64), =4.44;
=6.8﹣2, ②0.25×(32+64)÷0.6,
=4.8; =0.25×96÷0.6,
②(2.5×73)×0.4, =0.25×4×24÷0.6,
=2.5×0.4×73, =24÷0.6,
=1×73, =40;
=73;
③ ÷[ ×( ﹣ )],
③ ,
= ÷[ ×( )],
=( )+( ),
= ÷ ,
= ;
= ,
④0.25+ + + ,
=2;
=(0.25+0.75)+( ), ④ ×[1﹣( ﹣ )],
=1+1,
= ×[1﹣( )],
=2;
⑤32.5×1.7+32.5×9.3﹣32.5,
= ×[1﹣ ],
=32.5×(1.7+9.3﹣1),
=32.5×10,
= × ,
=325
68.(1)13.5﹣(6.9+6.1)÷2.6,
= .
=13.5﹣13÷2.6,
=13.5﹣5, 70.①3.6﹣2.8+6.4﹣7.2,
=8.5; =(3.6+6.4)﹣(2.8+7.2),
=10﹣10,
(2)15× ,
=0;
=3× × , ② ,
=7.2×[8÷0.4],
=2× ,
=7.2×20,
=144;
= ;
③(6.9﹣3.15)÷0.3×0.8,
小升初真题混合运算----35=3.75÷0.3×0.8, =10;
=12.5×0.8,
③6.3× +6.3÷ ,
=10;
④ ÷( × )﹣1 , =6.3× +6.3× ,
= ÷ ﹣1 , =6.3×( ),
=6.3;
= ﹣ ,
④ [( )× ],
=
= ÷[( )× ],
71.(1)( )×36,
= [ ],
= ×36+ ×36+ ×36,
= × ,
=12+6+4,
=22;
=1
(2)5.28﹣(2.56+0.44)+1.72,
=5.28+1.72﹣3, 73.(1)40.5÷0.81﹣16×2.4
=7﹣3, =50﹣38.4,
=4; =11.6;
(3) , (2) ÷[ ×( ﹣ )
=( )× , = [ × ]
=1× , = ,
=10;
= ;
(3)6.72÷1.2
(4)25×12.5×32, =6.72÷6÷0.2,
=24×4×12.5×8, =1.12÷0.2,
=100×100, =5.6;
=10000; (4)18.1﹣5.7﹣4.3+1.9
(5)(5﹣4.75)÷(2×2.5﹣3), =(18.1+1.9)﹣(5.7+4.3),
=0.25÷2, =20﹣10,
=0.125, =10;
(5)3.8×4.2+38×0.58
(6)27÷7+43×(1﹣ ),
=3.8×4.2+3.8×5.8,
=(4.2+5.8)×3.8,
= ,
=10×3.8,
=38.
= ,
(6)1.25×9﹣1.25
=10 =(9﹣1)×1.25,
72.①20.3×16﹣4560÷15, =8×1.25,
=324.8﹣304, =10
=20.8;
②2.5×0.125×32, 74. (1)3.6﹣2.8+6.4﹣7.2,
=(2.5×4)×(0.125×8), =(3.6+6.4)﹣(2.8+7.2),
=10×1, =10﹣10,
小升初真题混合运算----36=0;
=9÷ ,
(2)6.3× +13.7÷15,
=8
76.(1)3.7﹣2.2+7.3﹣7.8,
=6.3× +13.7× ,
=(3.7+7.3)﹣(2.2+7.8),
=11﹣10,
=(6.3+13.7)× ,
=1;
=20× ,
(2)375+450÷18×25
=375+25×25
= ;
=375+625
=1000;
(3) ÷( + )× ,
(3)2.9× +1.1× ,
= ÷ × ,
=(2.9+1.1)× ,
= × × ,
=4× ,
= ;
= ;
(4) ×17+ ×23,
(4) ÷( ﹣ ),
= ×14+ ×23,
= ÷ ,
= ×(14+23),
=1.
77.(1)18.7﹣4.375﹣6.625,
= ×37,
=18.7﹣(4.375+6.625),
=17 =18.7﹣11,
75.(1)(0.125×8﹣0.5)×4, =7.7;
=0.125×8×4﹣0.5×4, (2)920÷40﹢23×50,
=4﹣2, =23+23×50,
=2; =23+1150,
=1173;
(2)( + )÷ ﹣ ,
(3)12×( + ﹣ ),
= ÷ ﹣ ,
=12× +12× ﹣12× ,
= ﹣ ,
=3+2﹣4,
=1;
= ;
(4)4.4× +3.6÷1 +0.75×2,
(3)907+907×9﹣900,
=907×(1+9)﹣900,
=4.4× +3.6× + ×2,
=907×10﹣900,
=9070﹣900,
= ×(4.4+3.6+2),
=8170;
(4)9÷[ +( ﹣ )], = ×10,
=9÷[ + ], =
小升初真题混合运算----3778.(1)4.5×9.9+0.1,
=8.5+ ,
=4.5×(10﹣0.1)+0.1,
=4.5×10﹣4.5×0.1+0.1, =8.5+0.5,
=45﹣0.45+0.1, =9;
=44.55+0.1,
(4)[2﹣( ﹣1.5)÷ ]× ,
=44.65;
(2)16﹣ + ﹣ , =[2﹣( ﹣ )× ]× ,
=16﹣( ) , =[2﹣ × ]× ,
=16﹣1 , =[2﹣ ]× ,
=15 ; = × ,
(3)1.25×2.5×3.2, =12.
=(1.25×8)×(2.5×0.4), 80.①205﹣105×12÷45,
=10×1, =205﹣105×12÷45,
=10; =205﹣1260÷45,
(4)8.1÷(9﹣6.3×1.4), =205﹣28,
=8.1÷(9﹣8.82), =177;
=8.1÷0.18, ②1.05×(3.8﹣0.8)÷6.3,
=45; =1.05×3÷6.3,
(5)59+59×13+14×41, =3.15÷6.3,
=59×(13+1)+14×41, =0.5;
=59×14+14×41,
③( + )÷ ,
=(59+41)×14,
=100×14,
=( )÷ ,
=1400
79.(1)30.5﹣40÷8×2.4,
= ,
=30.5﹣12,
=18.5;
= ,
(2)1.6× + ÷2.4,
= ;
=1.6× + ÷ ,
④( + )÷50%,
=1.2+ × ,
=( ) ,
=1.2+0.5,
=1.7;
= ×2,
(3)8.5+[( ﹣0.005×700)÷ ],
=1 ;
=8.5+[( ﹣3.5)× ],
⑤884÷34+17×21,
=26+357,
=8.5+[( ﹣ )× ],
=383;
=8.5+[ × ﹣ × ], ⑥3.75×(1.2﹣ )+ ,
=8.5+[ ﹣ ], =3.75×( )+ ,
小升初真题混合运算----38=3.75× ﹣3.75× , ⑥ ×[( ﹣ )÷ ],
=4.5﹣1.25+0.75,
= ×[ ÷ ],
=4
81.(1)45.78+45.78×99,
= × × ,
=45.78×(1+99),
=45.78×100,
=
=4578;
(2)3.6﹣2.8+7.4﹣7.2, 84.①0.6﹣0.2×1.9÷7.6,
=(3.6+7.4)﹣(2.8+7.2), =0.6﹣0.38÷7.6,
=11﹣10, =0.6﹣0.05,
=1; =0.55;
(3) ×67+33× , ②5÷ ﹣ × ,
=(67+33)× , =5× ﹣ × ;
=100× , =7﹣
=40
=6 ;
82.1÷2.5+2.5×0.4+1,
=0.4+1+1, ③1.02÷(5+0.4×0.25),
=2.4. =1.02÷(5+0.1),
83.①7.6﹣4.8+8.4﹣5.2, =1.02÷5.1,
=(7.6+8.4)﹣(4.8+5.2), =0.2;
=16﹣10,
④ ÷( + )× ,
=6;
②4×0.8×2.5×1.25,
= ÷ × ,
=(4×2.5)×(0.8×1.25),
=10×10,
= × × ,
=100;
③ × + ÷ , = × ,
= × + × , = ;
=( + )× , ⑤3÷ ×( ﹣ ),
=1× , =3÷ × ,
= ; =3× × ,
④1375﹣375÷15×18,
=4× ,
=1375﹣25×18,
=1375﹣450, =2
=925; 85.(1)4.5×8.8﹣2.2×4.5﹣4.5
⑤1.05×(3.8﹣0.8)÷6.3, =(8.8﹣2.2﹣1)×4.5,
=1.05×3÷6.3, =5.6×4.5,
=3.15÷6.3, =4.5×0.8×7,
=0.5; =3.6×7,
=25.2;
小升初真题混合运算----39=5.9÷0.5,
(2)38 ﹣15.4+0.125﹣4.6
=11.8;
=38.875﹣15.4+0.125﹣4.6,
(6) ÷[56×( )],
=(38.875+0.125)﹣(15.4+4.6),
=39﹣20,
= ÷[56× ﹣56× ],
=19;
(3) = ÷[24﹣21],
= × , = ÷3,
=( )× , =
87.(1)54.75﹣5.25﹣14.75,
=1× ,
=54.75﹣(14.75+5.25),
=54.75﹣20,
= ;
=34.75;
(2)16.4÷(4.3×2﹣0.4),
(4)
=16.4÷(8.6﹣0.4),
=16.4÷8.2,
=126×[ ],
=2;
(3)1.25×32,
=126× ,
=(1.25×8)×4,
=8 =10×4,
86.(1)18﹣10.4÷(6.2﹣4.9), =40;
=18﹣10.4÷1.3,
(4) ×[1﹣( ﹣ )],
=18﹣8,
=10;
= ×[1﹣ ],
(2) ,
= × ,
=( + )﹣( + ),
= .
=2﹣1,
=1; 88.①730﹣240÷15×16,
=730﹣256,
(3)2﹣ ,
=474;
②[2.06﹣(1.73﹣0.29)]×1.5,
=2﹣ × × ,
=[2.06﹣1.44]×1.5,
=0.62×1.5,
=2﹣ × ,
=0.93;
=2﹣ , ③ ÷[( + )× ],
=1 ; = ÷[ × ],
(4)3.6÷0.4+1.3×5,
= ÷ ,
=9+1.3×5,
=9+6.5,
= ×6,
=15.5;
(5)[6.85﹣(0.75+0.2)]÷0.5,
= ;
=[6.85﹣0.95]÷0.5,
小升初真题混合运算----40④6.8+2.37+7.63+4.2,
=(6.8+4.2)+(2.37+7.63),
③ + × ÷2,
=11+10,
=21;
= + ÷2,
⑤ ×17÷9+3÷8× ,
= + ,
= ×17× +3× × ,
= ;
= × + × ,
④2.3+3.91÷(22﹣19.7),
=2.3+3.91÷2.3,
=( + )× ,
=2.3+1.7,
=4;
=
⑤ ×[ ﹣( ﹣ )],
89.(1)13.72﹣1.65﹣2.35,
=13.72﹣(1.65+2.35),
= ×[ ﹣ ],
=13.72﹣4,
=9.72;
= × ,
(2)2.4+3.6÷1.2×0.2,
=2.4+3×0.2
= .
=2.4+0.6,
=3;
(3)(12.5+1.25)×0.8,
=12.5×0.8+1.25×0.8,
=10+1,
=11;
(4)5.4×7.2+2.8×5.4
=(7.2+2.8)×5.4,
=10×5.4,
=54;
(5)2÷(1.2﹣0.4×2.5)
=2÷(1.2﹣1),
=2÷0.2,
=10;
(6)0.3×[(13.4﹣10)÷0.5+1.5]
=0.3×[3.4÷0.5+1.5],
=0.3×[6.8+1.5],
=0.3×8.3,
=2.49
90.①20﹣ ﹣ ,
=20﹣( + ),
=20﹣1,
=19;
②9.07×99+9.07,
=9.07×(99+1),
=9.07×100,
=907;
小升初真题混合运算----41