文档内容
六年级上册数学暑假计算题预习
分数乘除法(专项训练)
1.能简算的要简算。
① ②
1 3 2 8 13
( + − ) × 12 6 ÷ ÷
6 4 3 13 2
③ ④
8 1 6 2 1 1
÷ 7 + × 5 ÷ [( + ) × ]
13 7 13 3 5 13
⑤ ×99 ⑥
4 1 1 3 1
( − ) × ÷
25 2 6 5 5
2.脱式计算。
( ) ( )
1 2
5 4 4 3 1 1
× × ÷ 99 + ×
16 7 15 4 4 99
( ) ( )
3 4
8 12 9 9 5 11
÷ × 12 − × −
15 17 34 10 21 14
3.脱式计算① ÷ - ② - ×
1 2 2 3 3 1
2 3 5 4 4 6
( )
③ ÷ ÷9 ④ ×[1 ÷ - ]
12 2 7 7 1
13 15 10 10 5
( ) ( )
⑤ ÷[ + × ] ⑥[4- - ]×
4 1 2 4 3 3 4
5 2 3 7 4 8 29
4.计算下面各题。(能简算的要简算)
( ) ( )( )
1 3× ÷ ÷4 2 - × ÷
1 3 4 1 4 2
3 4 5 2 5 3
( )( ) ( )
3 + ×24× 4 128×
1 1 1 17
6 8 7 126
5.脱式计算。(能简算的要简算)
( )( ) ( )
1 - ÷ -
3 5 1 1
4 8 2 3( )( ) ( )
2 100-9 × -
1 1
7 13
( ) ( )
3 20× - ×
4 3 7
5 4 15
( ) ( ) ( )
4 2.9× 3.8- ÷ +
4 3 5
5 8 8
6.计算下面各题。(能简算的要简算)
( ) ( )
1 2
2 5 7 5
( + ) × 9 × 17 (2 + ) ×
51 18 5 14
( ) ( )
3 4
5 1 2 1 4 2 2 1
( − × ) ÷ ÷ [( − ) × ]
6 4 3 6 9 3 9 27.脱式计算。(能简算的要简算)
( ) ( )( )( )
1 × + ÷ 2 - ÷ ×
23 9 27 10 8 1 7 2
5 10 5 9 9 3 18 3
( )( ) ( ) [ ( )]
3 - ×63- 4 × + -
1 1 2 8 3 7 1
7 9 3 15 4 16 4
8.脱式计算。(能简算的要简算)
( ) ( ) ( )
1 ÷ - + 2 × + ×
4 2 2 1 1 1 3 1
5 3 5 3 4 4 4 4
( )( ) ( )
3 + - ×48 4 ÷ + ×
5 7 2 1 4 1 1
24 12 3 3 9 3 4
9.脱式计算。(能简算的要简算)
( )( ) ( ) ( )( )
1 + × + 2 + - ÷
7 3 5 1 1 11 3 1
8 16 9 3 3 12 4 24( ) ( ) ( )
3 ÷ - × 4 1÷[ + ÷ ]
5 3 2 3 3 1 5
6 4 9 4 4 3 8
10.脱式计算。(能简算的要简算)
①36× × ② × + ×
11 7 35 4 35 11
6 44 9 15 9 15
( )
③50× - ④ × + ÷ + ×
7 4 24 11 61 8 13 11
5 3 5 8 10 5 10 8
( ) ( )
⑤ - ÷ ⑥ ×29+ ×
27 19 4 14 58 5
4 5 5 9 9 4
11.仔细计算。
( ) ( ) ( )
1 ÷ ÷ 2 ÷ +
3 1 14 23 3 2
5 4 15 25 4 5( )( ) ( )
3 - + ×24 4 × + ÷
2 1 1 4 2 1 3
3 2 6 5 3 5 4
12.下面各题怎样简便就怎样算.
( ) ( )
1 + ÷4 2 2.5× ×0.4×
5 2 3 4
7 7 8 9
( )( ﹣ ) ( ) ( ﹣ ﹣ )
3 ÷ 4 ÷ 3
2 5 1 7 7 8
3 8 24 18 15 15
13.计算下面各题,怎样简便怎样算。
( )( - ) ( ) +
1 × 2 25× 11÷13
3 1 5 1
5 4 3 13
( )
3 2-
6 9 2
÷ −
13 26 3
14.按运算顺序计算下面各题。( ) ( - ) ( ) -( )
1 ÷[8× ] 2 [1 + ]÷
4 1 2 1 3 1
5 2 5 4 8 4
15.计算下列各题,怎样简便就怎样计算.
( ) ( )( ﹣ )
1 ÷15× 2 1 ÷ ×
5 3 3 6 10
2 7 10 7 13
( ) ( ﹣ ) ( )
3 68× 4 ÷ + ×
3 11 5 9 7 4
4 34 12 4 12 9
16.计算下面各题,能简算的要简算.
( ) ( ) ( )
1 ÷7+ × 2 ÷ + ÷
8 1 6 11 5 3 5
13 7 13 13 8 4 8
( ) ( ) ( ) ﹣( )
3 ÷7× × 4 +2
35 4 3 19 3 1
36 15 5 20 5 817.脱式计算(前 3 题用简便方法计算)
① ②
4 3 4 5 8 6
× + ÷ ÷ 9 − ÷ 9
15 5 15 2 11 11
③ ④
1 1 7 3
( − ) × 15 × 17 35 ÷ ( ÷ )
15 17 5 10
⑤ ⑥
1 2 7 7 1 1
30 ÷ [( + ) × ] × × 39 ÷
4 7 20 13 8 16
18.下面各题怎样简便就怎样算.
① × - ÷ ②1- ÷ -
7 5 3 8 5 25 3
2 8 2 5 8 28 10
( ) ( )
③ + × ÷ ④ ÷[ + ×2]
2 4 5 20 4 3 1
3 15 6 21 5 5 2( )
⑤ ×58+42÷8 ⑥36× + -
1 2 1 1
8 3 6 4
19.计算(能简算的要简算).
( )( ﹣ ) ( )
1 ×18 2 ÷ ÷
5 1 4 16 5
6 3 9 15 8
( ) ( ) ﹣ ( )
3 2.6× +2.4÷ 4 1 ÷ +
7 5 7 3 1
5 7 9 4 8
20.计算下面各题,能简便的要简便计算。
① ÷ × ②3.18- -
5 3 3 5 7
8 20 10 12 12
( )
③ × + ÷1.5 ④2.8÷ +12.2×
5 7 4 5 6
6 10 5 6 5( )
⑤[0.7- - ]÷
3 3 11
4 5 10
21.计算下面各题.
( )( ) ( ) ﹣( )
1 ×15×17 2 [1 ]×
1 2 1 1 24
+ −
15 17 2 3 25
( )
3
17 29 8 17
× + ×
25 37 25 37答案解析部分
1 .【答案】① ( + - ) ×12
1 3 2
= ×12+ ×12- ×126 4 3
1 3 2
=2+9-8
6 4 3
=3
②6÷ ÷
8 13
=6× 1×3 2
13 2
= 8 13
3
③2 ÷7+ ×
8 1 6
= 1×3 + ×7 13
8 1 1 6
( )
=13 7+7 13×
8 6 1
= ×13 13 7
14 1
=13 7
2
( )
④135÷[ + × ]
2 1 1
=5÷[ × 3 ]5 13
13 1
=5÷ 10 13
1
=50
10⑤ ×99
4
( )
= 2×5 100-1
4
=25×100-
4 4
=1256- 25
4
= 25
21
⑥15(
-
)
× ÷
25
1 1 3 1
= × ×256 5 5
1 3
=1
3 5
2
.【答案】(
1
)
× ×
5 4 4
= × × 16 7 15
5 4 4
=16×15 7
1 4
=12 7
1
( )
221 ÷99+ ×
3 1 1
= × 4+ × 4 99
3 1 1 1
( )
=4 ×99 4+99
1 3 1
=99×1 4 4
1
99=
1
( )
939 ÷ ×
8 12 9
= × 15× 17 34
8 17 9
=15 12 34
1
( )
145 12- × -
9 5 11
=12- - 10 21 14
3 11
( )
=12-14 14+
3 11
=12-1
14 14
=11
3 .【答案】① ÷ -
1 2 2
= × - 2 3 5
1 3 2
=2 2 5
7
②20 - ×
3 3 1
( )
= ×4 41-6
3 1
=4× 6
3 5
=4 6
5
③8 ÷ ÷9
12 2
13 15= × ×
12 15 1
=13 2 9
10
( )
④13 ×[1÷ - ]
7 7 1
= 1×0[1÷ ] 10 5
7 1
=10×2 2
7
=10
7
( )
⑤5 ÷[ + × ]
4 1 2 4
= ÷5[ × ]2 3 7
4 7 4
=5÷ 6 7
4 2
=5 3
6
( )
⑥5 [4- - ]×
3 3 4
=[4- ]× 4 8 29
3 4
= ×8 29
29 4
= 8 29
1
4 . 2 【答案】( 1 )
1 3 4 1 1
( 2 ) 3 × ÷ ÷ 4 = 1 × × =
3 4 3 4 3
2 1 4 2 4 2 3 2 3 3
− × ÷ = − × = × =
5 2 5 3 5 5 2 5 2 5( )
3
1 1 1 1 1 1 1 4 3
( ) + × 24 × = × 24 × + × 24 × = + = 1
4 6 8 7 6 7 8 7 7 7
17 17 17 17
128 × = 126 + 2 × = 126 × + 2 × =
126 126 126 126
17 17
1 5 .7 +【答 63 案=】1(7 6 1 3 )( - ) ÷ ( - )
3 5 1 1
= ÷ 4 8 2 3
1 1
=8 6
3
( )( ) ( )
42 100-9 × -
1 1
=91× 7 13
6
=6
91
( ) ( )
3 20× - ×
4 3 7
=20× × 5 4 15
1 7
=1× 20 15
7
= 15
7
( ) ( ) ( )
145 2.9× 3.8- ÷ +
4 3 5
=2.9×3×1
5 8 8
=8.7
6
.【答案】(
1
)=6+42.5
2 5 2 5
=48.5
+ × 9 × 17 = × 9 × 17 + × 9 × 17
51 18 51 18
( )
2
7 5 10 7 5 17 5 17
( ) 2 + × = + × = × =
3 5 14 5 5 14 5 1=44 14
5 1 2 1 5 1 4
( ) − × ÷ = − × 6 = × 6
4 6 4 3 6 6 6 6
4 2 2 1 4 6 2 1 4 4 1 4
÷ − × = ÷ − × = ÷ × = ÷
9 3 9 2 9 9 9 2 9 9 2 9
2 4 9
97
.=【
9
答×案
2
】=(2
1
)
× + ÷
23 9 27 10
= × + × 5 10 5 9
23 9 27 9
( )
= 5 1+0 5 ×10
23 27 9
=10×5 5 10
9
=9
10
( )( ) ( )
2 - ÷ ×
8 1 7 2
= ÷ 9 3 18 3
5 7
=9 27
15
( )( )
73 - ×63-
1 1 2
= ×63-7 9 3
2 2
=263- 3
2
3=
4
( ) ( )
34 ×[ + - ]
8 3 7 1
= ×[1+5 4] 16 4
8 3 3
=15× 4 16
8 15
=15 16
1
8 . 2 【答案】( 1 ) ÷ - ( + )
4 2 2 1
= - - 5 3 5 3
6 2 1
=5-5 3
4 1
=5 3
7
( )
125 × + ×
1 1 3 1
( )
= +4 4×4 4
1 3 1
=1×4 4 4
1
= 4
1
( )( )
43 + - ×48
5 7 2
= ×48+24 ×1428-3 ×48
5 7 2
=10+28-32
24 12 3
=6( )
4 ÷ + ×
1 4 1 1
= × +3 ×9 3 4
1 9 1 1
( )
=3×4 3+4
1 9 1
=3× 4 4
1 5
=3 2
5
9 . 6 【答案】( 1 )( + ) × ( + )
7 3 5 1
= × 8 16 9 3
17 8
=16 9
17
( )( )
128 + - ÷
1 11 3 1
( )
= + 3- 12×424 24
1 11 3
= ×324+12 4×24- ×24
1 11 3
=8+22-18
3 12 4
=12
( )
3 ÷ - ×
5 3 2 3
= - 6 4 9 4
10 1
= 9 6
17
( ) ( )
148 1÷[ + ÷ ]
3 1 5
4 3 8=1÷[ × ]
13 8
=1÷ 12 5
26
= 15
15
102 . 6 【答案】①36× × =6×11× =3× = ; ② × +
11 7 7 7 21 35 4
× = ( 6 ) 44= =44 ; ③2 502× ( -9 ) =1550×
35 11 35 4 11 35 35 7 4
( 9 15 ) 9 ×=50×15=+ 1 ; 5 ④9 ××1 9 + ÷ 5+ 3 ×
21 20 1 10 24 11 61 8 13
=15 − 15 15= 3 + =5 ; ⑤8 ( 10- 5 ) ÷10=
11 264 305 143 528 448 61 27 19 4 135
8 40 =+ 80 += 80 ; ⑥80 ( 80 ×529+ 4 ) × 5 5 20 −
76 4 59 5 59 14 58
2=0 (÷ 5 20 × 4 ) 16 = 9= . 9
5 406 58 5 464 5 580
411 .【 9 答案+】 9 ( 1 )× 4 ÷9 ×÷4 9
3 1 14
= 5 4 15
3 4 15
=5 × 1 × 14
18
( ) ( )
72 ÷ + = ÷ = × =
23 3 2 23 23 23 20 4
( )( ) - -
3 25 - 4 + 5 ×242=5 ×220425 ×2234+5 ×24=16 12+4=8
2 1 1 2 1 1
( )
4 ×3 +2 ÷6 = × 3 + 2× = 6 =
4 2 1 3 4 2 1 4 8 4 4
12 .【 5 答案】 3 ( 15 ) 4+ 5 ÷4 3 5 3 15 + 15 5
5 2
7 7=
+
5 1
=
7 14
11
( )
2142.5× ×0.4×
3 4
=( ) ( )
2.5×0.48 × 9×
3 4
=
1× 8 9
1
=
6
1
( )( ﹣ )
36 ÷
2 5 1
=( ﹣ )
3 8×24 24
2 5
= ﹣
×324 8 ×24
2 5
= ﹣
16 15
3 8
=
1
( ) ( ﹣ ﹣ )
4 ÷ 3
7 7 8
= ﹣( )
1÷8[3 15+ 15 ]
7 7 8
= ﹣
18 ÷[3 1] 15 15
7
=
18 ÷2
7
=
18
7
13 . 3 【 6 答案】( 1 )( - ) ×
3 1 5
5 4 3= × - ×
3 5 1 5
=15- 3 4 3
5
= 12
7
( )
122 25× +11÷13
1
=25× +1113×
1 1
( )
= 251+311 ×13
1
=36× 13
1
= 13
36
( )
133 2- ÷ -
6 9 2
=2- - 13 26 3
4 2
( )
=2-3 3 +
4 2
=2-2
3 3
=0
14
.【答案】(
1
)
÷[8×
(
-
)
]
4 1 2
= ÷[8× ] 5 2 5
4 1
=5÷ 10
4 4
=1
5 5( ) ( )
2 [1- + ]÷
1 3 1
=[1- ]÷ 4 8 4
5 1
= ÷8 4
3 1
=8 4
3
152
.【答案】(
1
)
÷15×
5 3
=
× 2 7
1 3
=
6 7
1
( )( ﹣ )
214 1 ÷ ×
3 6 10
=( ﹣ )
1 10× 7 13
7 10
=
× 20 13
13 10
=
20 13
1
( ) ( ﹣ )
32 68×
3 11
= ﹣
68× 684× 34
3 11
= ﹣
51 22
4 34
=
29
( )
4 ÷ + ×
5 9 7 4
=
1×2 +4 1×2 9
5 4 7 4
12 9 12 9= ( )
× +
4 5 7
=
9×1 = 12 12
4 4
16 . 9 【答 9 案】( 1 ) ÷7+ ×
8 1 6
=
× + × 13 7 13
8 1 1 6
=( )
13 +7 7 ×13
8 6 1
=
1× 13 13 7
1
=
7
1
( ) ( )
27 ÷ + ÷
11 5 3 5
=
1÷3 ÷8 4 8
11 11 5
=
13 ÷ 8 8
8 5
=
13 8
64
( ) ( )
365 ÷7× ×
35 4 3
=
3÷67× 15 5
35 4
=
36 × 25
5 4
=
36 25
1
( ) ﹣( )
445 +2
19 3 1
20 5 8= ﹣
2
19 29
=﹣
201 40
31
17 .【答 40 案】① = × + × = × ( + )
4 3 4 5 4 3 4 2 4 3 2
= ×1= ② 15 × 5 + 15 ÷=2 ×15- 5 ×15= 5× ( 15 - 5 ) 5
4 4 8 6 8 1 6 1 1 8 6
=1×5 =15③11 ÷ 9 − 11 ÷ 9 11 9=11×195×917- 11×1115×17=17-1
1 2 2 1 1 1 1
5=92④11 99 ( 15 − 17 =)3×5÷ (15 ×× 17) =1355÷ =35×17 = ⑤
7 3 7 10 14 3 105
35 ÷ ( 5 =÷30 1 ÷ 0 [) × ]=5303÷ =30×3 =1601⑥4 14 30 ÷
1 2 7 15 7 3 16 7 1
[( 4 + 7 =) ×× 20 ×]39×162=8 ( 20 ×39 ) 1×6 ( ×136 ) =21×21=342 × 8 ×
1 7 1 7 1
3 18 9.÷【 1 答 6 案 13 】 8① × ﹣ 13 ÷ 8
7 5 3 8
= ﹣
× 2× 8 2 5
7 5 3 5
=( ﹣ )
2 8 2 × 8
7 3 5
=
2× 2 2 8
5
=
8
5
﹣ ﹣
②14 ÷
5 25 3
= ﹣ ﹣
1 8 28 10
7 3
= ﹣( )
1 10 +10
7 3
10 10= ﹣
1 1
=
0
( )
③ + × ÷
2 4 5 20
=( )
3 + 15 ÷ 6 21
2 2 20
=
×3 9 21
8 20
=
9 21
14
( )
④ 15÷[ + ×2]
4 3 1
=
5 ÷[ 5 ×2]2
4 11
=
5 ÷ 10
4 11
=
5 15
4
⑤ 11×58+42÷8
1
=( )
8 58+42 ×
1
=
100× 8
1
=
12.5
8
( ﹣ )
⑥36× +
2 1 1
= ﹣
36× 336×6 346×
2 1 1
= ﹣
24+6 9
+
3 6 4
=
2119
.【答案】(
1
)( ﹣ )
×18
5 1
= ﹣
×18 ×18 6 3
5 1
= ﹣
15 6
6 3
=
9
( )
2 ÷ ÷
4 16 5
=
9× 15 8
5 8
=
12 5
2
( )
33 2.6× +2.4÷
7 5
=
2.6× +52.4× 7
7 7
=( )
2.6+52.4 × 5
7
=
5× 5
7
=
7
5
( ) ﹣ ( )
4 1 ÷ +
7 3 1
= ﹣
1 ÷9 4 8
7 7
= ﹣
1 9 8
8
=
9
1
20 . 9 【答案】① ÷ ×
5 3 3
8 20 10= × ×
5 20 3
=8 3 10
5
②4 3.18- -
5 7
( )
=3.18- 12 +12
5 7
=3.18-1
12 12
=2.18
( )
③ × + ÷1.5
5 7 4
( )
= ×6 1+0 5 ÷
5 7 8 3
=6× ×10 10 2
5 15 2
=6 10 3
5
④6 8÷ +12.2×
5 6
=8× +612.2× 5
6 6
( )
= 25.8+12.25 ×
6
=15× 5
6
=18
5
( )
⑤[0.7- - ]÷
3 3 11
( )
=[ - -4 5 ]÷10
7 15 12 11
10 20 20 10=[ - ]÷
7 3 11
( )
= 10 2-0 10×
14 3 10
= ×20 20 11
11 10
=20 11
1
212
.【答案】(
1
)( )
×15×17
1 2
= +
×15×17+ ×1155×1717
1 2
=
17+30
15 17
=
47
( ) ﹣( )
2 [1 ]×
1 1 24
= ﹣ −
[1 ]× 2 3 25
1 24
=
× 6 25
5 24
=
6 25
4
( )
35
17 29 8 17
= × + ×
2×5 37+ 25 × 37
29 17 8 17
=( )
25 +37 25× 37
29 8 17
=
2×5 25 37
37 17
=
25 37
17
25