文档内容
小升初计算专项练习(一)
年 月 日
一、脱式计算(能简便的简便运算)
(1)0.25×3.2×1.25
(2)9÷
1
-
3
÷9 (3
5 5
=0.25×(4×0.8)×1.25
=9×5-
3
×
1
6.35-
1
-2
3
+4.65
5 9 5 5
=0.25×4×(0.8×1.25)
1 1 3
=45- =6.35+4.65-( +2 )
=1 15 5 5
=44 =11-
14 14
15 =8 5
1
(4)69×75%+7.5×3.1 (5)( 5 + 2 )×7+ 13 (6 5) 7 ÷[ 3 ÷( 1 - )]
7 27 27 5 8 4
1
=6.9×7.5+7.5×3.1 = 5 ×7+ 2 ×7+ 13 = 7 ÷[ 3 ×8] 8
7 27 27 5 8
=7.5×(6.9+3.1)
14 13 7
=5+( + ) = ÷
=75 27 27 5
=6
=
3
7
(7) 4 5 2 (8)53.2 3 46.80.3 15 1 5 6
9 9 5 10 (9)20
8 6 23
=53.20.346.80.3
3 20 6
=20
=
4
2 =(53.246.8)0.3 24 24 23
9 9
2
=1000.3
=20
23
6
= 24 23
3 =30
1
=20
4
=80
二、解方程
1 3
(1) x4 x0.2x0.16
4 5
解:x4
1 解:0.6x0.2x0.16
4
0.8x0.16
x16
x0.160.8x0.2
(3)7(x-12)=9.1
(4)
7
:
3
x
6 4 18
解:x129.17
解:
3
x18
7
4 6
x121.3
3
x21
x1.312 4
3
x21
x13.3
4
x28小升初计算专项练习(二)
年 月 日
一、脱式计算(能简便的简便运算)
(1)25×13×4 (2)7.3-0.37+2.7-0.63
(3)
3
6
8
1
11 11 6
=25×4×13 =(7.3+2.7)-(0.37+0.63)
3 1 8 1
=100×13 =10-1 11 6 11 6
3 8 1
=1300 =9
11 11 6
1
1
6
1
6
(4)6.39÷0.25÷4
(5)4.5
4
5.580% (6)24
1
7
5
5 3 12 8
=6.39÷(0.25×4)
=4.5
4
5.5
4
=24
1
24
7
24
5
5 5 3 12 8
=6.39÷1
=(4.55.5)
4 =8+14-15
=6.39 5
=7
4
=10
5
=8
(7)12.5×(8+0.8)
(8)
1
4
5
(9)
3
5
5
18 15 8 8 8 3
=12.5×8+12.5×0.8
=
1
1
=
3
3
18 6 8 8
=100+10
1 3 3
= =
=110 18 18 4
2
=
9
二、解方程
2 1 1
(1)91.5 9x18 73.5 (2)3x1 x12x1 x1
3 3 2
1 1
91.56x126x1273.573.56x1273.5 3x1 x12x1 x1
2 3
6x1218 3 1 x1 2 1 x1
2 3
6x12121812
7 7
x1 x1
6x30 2 36x6306 7 x16 7 x16
2 3
x5
21x114x1
1 1
3x1 x12x1 x1
3 2 21x2114x14
21x2114x2114x1414x21
7x35
7x7357
x5
(3)2x+30%=9.2
(4)
2.1
=
7
x 8
解:2x+0.3-0.3=9.2-0.3 解:7x=2.1×8
2x=8.9 7x÷7=16.8÷7
2x÷2=8.9÷2 x=2.4
x=4.45小升初计算专项练习(三)
年 月 日
一、脱式计算(能简便的简便运算)
(1)26-7.28-12.72 (2)5.8×4.1+5.9×5.8
(3)
1
2
1.4
1
8 5 4
=26-(7.28+12.72) =5.8×(4.1+5.9)
1 2 7 1
=
=26-20 =5.8×10 8 5 5 4
1 8 7
=6 =58 =
8 20 20
1 3
=
8 4
1
=
6
(4)2.73×99+2.73
(5)
5
39 (6)
80%
1
7
0.7
38 4 3
=2.73×99+2.73×1
5 4 1 7
= (381) = 0.7
=2.73×(99+1) 38 5 4 3
5 5 16 5 7
=2.73×100 = 38 1 = 0.7
38 38 20 20 3
=273
=5
5
=
21
7
0.7
38 20 3
5 21 3
=5 = 0.7
38 20 7
=0.450.7
=1.15
(7)
3
44
3 (8)120-52-48
(9)
5
3
72
4 4 9 8
=120-(52+48)
3 1 3 5 3
= 4 = 72 72
4 4 4 =120-100 9 8
=
3
3
(4
1
) =20
=4027
4 4 4
=13
9
= 1
16
9
=
16二、解方程
9 1 3 1 1 5
(1) x (2) : :x
4 4 8 3 20 9
9 1 1 3 1 1 5 1
解: x x x 解: x
4 4 4 8 4 3 9 20
1 3 9 1 1
x x
4 8 4 3 36
1 3 3 9 3 1 1
x x
4 8 8 4 8 36 3
1 15 1
x x
4 8 12
1 1 15 1
x
4 4 8 4
15
x=
2
(3)1.4x0.67.8 (4)15x460
解:1.4x7.80.6 解:15x44604
1.4x8.4 15x240
x8.41.4 15x1524015
x6 x16小升初计算专项练习(四)
年 月 日
一、脱式计算(能简便的简便运算)
6 3 6 4 2 7 3 7
(1) (2)54.2 4.8 (3)3.3 0.755 0.75
7 7 7 7 9 9 4 10
=
6
7
6
7
=(54.24.8)(
2
7
)
=3.30.750.755.70.75
7 3 7 4 9 9
=(3.35.71)0.75
=2
3 =591
2 =100.75
=58
1
=3
=7.5
2
(4) 1
2 130%
(5)5.8-(5.8-3.8) ×2 (6)101×2.5-2.5
2 7
=5.8-2×2 =101×2.5-2.5×1
1 2 7
=
2 7 10 =5.8-4 =2.5×(101-1)
1 1
=
=1.8 =2.5×100
2 5
=
5 =250
2
(7)(1+ )÷( ÷ )
(8) (9)
3 3 1 202 50505 13131313
0.754.754 4 4.25
= ÷( × ) 4 4 21 2121 212121 21212121
=0.75×4.75+4.75+
=
1
+
1
×
202
+
1
×
50505
= ÷ 21 21 101 21 10101
4.75×4.25
1 13131313
+ ×
= × =4.75×(0.75+1+4.25) 21 1010101
1
=
=4.75×6
=
21
×(1+2+5+13)
=28.5
=
1
×21
21
=1
二、解方程
(1)4x+5=17
(2)
3
∶x=3∶12
4
解:4x+5-5=17-5
3
解:3x= ×12
4x=12 4
3x=9
4x÷4=12÷4x=3 3x÷3=9÷3
x=3
(3)
x
=
9 (4)x+0.5x=30
0.4 2
解:1.5x=30
解:2x=9×0.4
1.5x÷1.5=30÷1.5
2x=3.6
x=20
2x÷2=3.6÷2
x=1.8小升初计算专项练习(五)
年 月 日
一、脱式计算(能简便的简便运算)
1 12 1 5 10 19
(1) 2.5 (2) 77 77 (3)23
13 13 3 7 11 24
1 12 13 5 10 19
= =( 77)( 77) =(24-1)×
13 13 6 7 11 24
=
1
2
=5570
=24×
19
-
19
13 24 24
=3850
1 19
=2 =19-
13 24
5
=18
24
(4)41 25% 1 60 0.25 (5)65.7523.515.75 (6) 7 2 5 3
4 6 5 6 5
1 1 1
65.7523.515.75
7 2 5 3
=41 60
4 4 4 65.7515.7523.5 6 5 6 5
1 26.5 7 5 2 3
=(41+60-1)×
4 6 6 5 5
1 21
=(101-1)×
4 1
1
=100×
4
=25
二、解方程
(1)x∶
3
5
∶10
(2)1234x80
4 6
解:364x80
5
解:10x=
8 4x8036
5
10x10= 10
4x44
8
x= 1 x444
16
x115 3 2 3
(3) x x (4) :x30%:10.8
12 4 3 2
3 2 5 3
解: x x 解:30%x 10.8
4 3 12 2
2
x
5
x
3 0.3x16.2
3 12 4
x16.20.3
8 5 3
x x
12 12 4 x54
1 3
x
4 4
3 1
x
4 4
x3
3 1 1 4 1
(5) x0.7512.5%x (6) x1:0.375 x:
8 12 2 3 3
3 3 1 1 1 3 4 1
解: x x 解: x1: x:
8 4 8 12 2 8 3 3
3 3 3 1 1 3 11 3 4
x x x1 x
8 4 4 8 12 4 32 8 3
3 1 8 1 1 1
x x x x
8 8 12 6 3 2
3 1 1 8 1 1 1 1 1 1
x x x x x x x x
8 8 8 12 8 6 3 6 2 6
1 2 1 1 1
x x x
4 3 2 6 3
1 2 1 1
x4 4 x
4 3 3 3
x
8 x1
3小升初计算专项练习(六)
年 月 日
一、脱式计算(能简便的简便运算)
1 5 11 5 7 6
(1)0.25×19+82×25%- (2) × + ÷12 (3)25.8- +14.2-
4 6 12 6 13 13
=0.25×19+82×0.25-0.25
=
5
×
11
+
5
×
1
=(25.8+14.2)-(
6
+
6 12 6 12 13
=0.25×(19+82-1)
5 11 1 7
= ×( + ) )
=0.25×100 6 12 12 13
=25; =
5
×1
=40-1
6
=39
5
= ;
6
(4)0.7+3.8+4.2+9.3
(5)
1
2
3
(6)(1+
1
)÷(1-
1
)
6 7 7 3 3
=(0.7+9.3)+(3.8+4.2)
1 2 4 2
= + = ÷
=10+8 6 3 3 3
=
5 =2
=18
6
二、解方程
(1)x:3.52:14 (2)5x73x15
解:14x23.5 解:5x3x157
14x7 2x22
x714 x222
1 x11
x
2
(3)2-35%x=1.3
(4)
2
x
1
x
1
3 2 12
解:2-35%x+35%x=1.3+35%x1.3+35%x-1.3=2-1.3
解:
1
x
1
6 12
35%x=0.7
1 1
6 x 6
35%x35%=0.735% 6 12
1
x=2
x=
2
2 1 12 3
(5) x+ x=42 (6)
3 2 2.4 x
解:
4
x+
3
x=42
解:12x=2.4×3
6 6
12x=7.2
7
x=42
6 12x÷12=7.2÷12
7 7 7
x÷ =42÷ x=0.6
6 6 6
6
x=42×
7
x=36小升初计算专项练习(七)
年 月 日
一、脱式计算(能简便的简便运算)
8 1 2 3 (2)
(3)
(1)
9 2 5 10
=(14.5+5 )﹣(16 +
8 1 1
9 2 10 =6× +13× ﹣18×
2 )
8 3
9 5 =20﹣19 =(6+13﹣18)×
8
15
=1
=1×
=
(4)
(5) (6)
= +2
=111÷[56× ﹣56× ]+ =
= +2
55 =
=2009+2
=111÷[24﹣21]+55
=2011
= +1
=111÷3+55
=2
=37+55
=92
二、解方程
(1)2.5+3x=8.5 (2)0.4∶x=1.2∶2
解:2.5+3x-2.5=8.5-2.5 解:1.2x=0.8
3x=6 1.2x÷1.2=0.8÷1.2
3x÷3=6÷3
x=
2
3
x=2(3)120%x+x=44 (4)9840%x56
解:2.2x=44 解:985640%x
2.2x÷2.2=44÷2.2 985640%x
x=20 0.4x42
x420.4
x105
(5)
x
5:2
(6)2.7x1.8x18
2.5
解:4.5x18
解:x:2.55:2
4.5x4.5184.5
2x52.5
x4
2x12.5
2x212.52
x6.25