第一篇:小数简便计算专项练习[最终版]
小数简便计算分类练习
一、加减法简便计算
1、加法交换律和加法结合律
6.9+4.8+3.14.02+5.4+0.98
1.76+0.195+3.24
1.57+0.245+7.43 6.02+3.6+1.98
0.134+2.66+0.8665.78+0.84+0.16
0.456+6.22+3.780.398+0.36+3.645.93+0.19+2.813.82+2.9+0.18+9.1 15.75+3.59-0.59+14.254.8+8.63+5.2+0.37
2.35+1.713+0.287+7.65
1.27+3.9+0.73+16.1
1.29+3.7+2.71+6.3 3.2+0.36+4.8+1.64
2.64+8.67+7.36+11.33
2、减法的性质
5.17-1.8-3.2
36.8-3.9-6.1
7.14-0.53-2.47
14-7.32-2.68 3.07-0.38-1.62
8-2.45-1.55
36.54-1.76-4.54
3、逆用减法的性质
13.75-(3.75+6.48)
146.5-(23+46.5)
12.7-(3.7+0.84)
4、减法的性质拓展应用
35.6-1.8-15.6-7.2
73.8-1.64-13.8-5.36
23.4-0.8-13.4-7.2
5、带着符号“搬家”
3.68+7.56-2.689.6+4.8-3.6
15.02-6.8-1.02
7.5+4.9-6.5 3.25+1.79-0.59+1.75
1.23+3.4-0.23+6.6
7.85+2.34-0.85+4.66 5.27+2.86-0.66+1.63
二、乘除法简便计算
1、乘法交换律和乘法结合律
0.25×16.2×4
0.5×16.2×2 12.5×0.96×0.8
4.36×12.5×8
0.95×0.25×4
35×0.2×0.5
0.75×50×0.4 0.73×0.25×4
0.35×1.25×2×0.8
2、将一个乘数拆成两个数相乘,再运用乘法交换律和结合律
0.25×36
25×4.4
8.8×1.25
1.25×2.5×32
3.2×0.25×12.5 2.5×2.4
3、乘法分配律
(1.25-0.125)×8
(2.5-0.25)×0.4
(20-4)×0.25
(2+0.4)×5
(125+2.5)×0.8
4、乘法分配律逆应用
3.72×3.5+6.28×3.5
4.8×7.8+7.8×0.524.8×7.8+7.8×0.52 7.09×10.8-0.8×7.0927.5×3.7-7.5×3.7
3.83×4.56+3.83×5.44 9.16×1.5-0.5×9.16
0.86×15.7-0.86×14.7
1.28×8.6+0.72×8.6
5、把一个乘数写成两个数相加(减),再利用乘法分配律
3.6×102
0.8×100.1
0.85×99
4.8×100.1
0.89×100.1
3.65×10.1
0.65×101
8.9×1.01 0.79×99
0.85×9.9
6、添加乘数“1”,利用乘法分配律
18.76×9.9+18.76
56.5×9.9+56.5
4.2×99+4.2
9.7×99+9.7 5.4×11-5.4
12.7×9.9+1.27
3.6-3.6×0.5
3.12+3.12×99
28.6×101-28.6
7、除法的性质
320÷1.25÷8
3.52÷2.5÷0.4
320÷1.25÷8
15.2÷0.25÷4
8.54÷2.5÷0.4 930÷0.6÷5
9.6÷0.8÷0.4
63.4÷2.5÷0.4
8、除法的性质逆应用
17.8÷(1.78×4)
3.9÷(1.3×5)
3.9÷(1.3×5)
9、除法的性质拓展应用
4.2÷3.5
0.49÷1.4
4.5÷1.8
4.9÷1.4
2.7÷45
70÷2.8
10、先算一步,再进行简便计算
(45.9-32.7)÷8÷0.125
7.74×(2.8-1.3)+1.5×2.26 21×(9.3-3.7)-5.6
(8.53-3.75)÷2.5÷4 4.25÷2.5×101-1.7
4×(9.3-5.7)+3.6 2.12-(1.12+3×0.33)
11、分两次运用运算律
6.8+1.25×6.8×8
18-1.8÷0.125÷0.8
第二篇:小数简便计算
小数简便计算
1.135+3.346+5.557+7.768+9.979 1.996+19.97+199.8
9.8+99.8+999.8+9999.8+99999.8 2.894.68+4.686.11+4.68
1.1+3.3+5.5+7.7+9.9+11.11+13.13+15.15+17.17+19.19
6.11+9.22+8.33+7.44+5.55+4.56+3.67+2.78+1.89
17.4837-17.4819+17.4882 1.250.322.5
28.6767+32286.7+573.40.05 754.7+15.925
172.46.2+27240.38 0.88812573+9993
0.00…01810.00…011 34.58.23-34.5+2.7734.5
963个0 1028个0
下面有两个小数:
a=0.00…0105 b=0.00…019
1994个0 1996个0 求a+b,a-b,ab,ab.12.34+23.45+34.56+45.67+56.78+67.89+78.91+89.12+91.23
6.250.16+2640.0625+5.26.25+0.62520
19.9837-199.81.9+19980.82
0.035935+0.035+30.035+0.07610.5
13.59.9+6.510.1 19.9837-199.81.9+19980.82
32.14+64.280.53780.25+0.537864.280.75-864.280.1250.5378
第三篇:简便计算小数
加法结合律:
1.83+3.97+0.17
10-0.34-0.66
2.1+3.5+7.9+6.5
63.97-4.63-7.37
乘法结合律:
2.5X(1.32x0.4)
12.5x(3.4x0.8)
2.5x4.4
53.37+15.69-13.37
80x4.76x125
0.25x1.25x4x8
0.125x8.8
4.78+6.47-3.78
28x1.25x8 2.5x2.8x4x5 0.125x32
2.5x1.6
12.5x3.2x2.5
0.25x6.4x12.5
1.25x32x0.5
乘法分配律:
3.8x9.9+3.8x0.1
1.4x3.6+3.6x8.6
56.9x99+56.9
3.5x46+46x6.5
(12.5-1.25)x0.8 4.56x9.9+45.6 3.26x10.7-3.26x0.7
2.5x(4+0.4)0.35x199+0.35
3.2x0.64+0.32x3.6
5.2x9.8
0.45x102
3.7x9.9 0.78x101
第四篇:小数简便计算综合练习2
小数简便计算综合练习2 1.25×0.7×0.8
2.7×3.7+0.37×73
1.25×0.4×80×2.5
8.7×99
0.8×(12.5 – 1.25)
5×1.03×0.2
32×1.25
1.87×9.9+0.187
3.65×4.7-36.5×0.37
3.52÷2.5÷0.4
4.2×99+4.2
0.45×99
3.14×0.68+31.4×0.032
101×0.87-0.91×87
320÷1.25÷8
0.89×100.1
4.8×7.8+78×0.52 12.7×9.9+1.27 8.76×9.9+0.876 9.6÷0.8÷0.4 17.8÷(1.78×4)
0.49÷1.4
1.25×2.5×32
3.65×10.1
3.83×4.56+3.83×5.44
9.7×99+9.7
3.14×0.68+31.4×0.032
27.5×3.7-7.5×3.7
(45.9-32.7)÷8÷0.125
7.2×0.2+2.4×1.4
12.7×9.9+1.27
4.2÷3.5
8.54÷2.5÷0.4
3.2×0.25×12.5
5.6÷1.25÷0.8÷2.5÷0.4
4.36×12.5×8 3.9×2.7+3.9×7.3
18-1.8÷0.125÷0.8 21×(9.3-3.7)-5.6
4.5÷1.8
63.4÷2.5÷0.4
4.9÷1.4
第五篇:小数简便计算
五年级小数简便计算
156.5-21.7-3.3-6.5
36.8-8.21+2.21
12.5×32×2.5
10.1×56
4.5×45+4.5×54+4.5
12.5×0.32×2.5
9.98×6.2
0.32×45+0.32×54+0.32
12.5×8.08
2.5×(33×44)
(0.13+0.13+0.13+0.13)×0.25
9.9×9.9+0.99
(0.125+0.25)×0.8
0.27×45+2.7×5.5
65×9.9+6.5
2.5×1.3×0.4
0.25×0.32×1.25
(2.5+0.25)×0.4
0.98×1.02
12.5×80.8
4.6×4.6+6.4×4.6-4.6
1.3×2.5+0.13×75
9.9×9.9+0.99
8.08×12.5
9.9×101-9.9
1.6×3.7×1.25
7.23×9.8
16.4÷0.2512÷0.25
100÷0.25×0.8
0.125×25×1.6
6.46×7.7+12.3×6.46 7.14-3.95+2.86-1.05 7.6×8.1+0.19×76
5.9×1.6+5.9×0.4
9.9×2.8
(6.78+6.78÷6.78-6.78)×6.78
70÷1.25
45.55-(6.82+15.55)
1.08×125
2.18÷2.5÷0.4
10.8×9.6+92×0.96
1.7÷0.4÷0.25
3.8×0.25÷0.38
7.1÷(0.25×0.71)
18.4-2.7-7.3-2.4
17.2-2.2+3.3-3.8
6.4-6.4×0.56-6.4×0.34
9.98×3.7
4.7×0.9+0.47
3.54×7.7+3.3×3.54-3.5415÷1.25
12.5×8.08
13.2-4.6+6.8-5.4
4.31×0.99
5.9×59+5.9×36+5×5.9
81.3-2.38-7.62
2.74×6.5-2.74+4.5×2.74
1.2÷1.25
(3.1+3.1+3.1+3.1)×2.5
7.4-7.4×0.7-7.4×0.2
2.5×4.04
1.25×3.2×0.25
7.92+3.08-3.54-6.45
7.13×0.5+7.13+8.5×7.13
9.9×2.8+28×0.01
8.8×1.25×0.2
(3.7×4.6+4.3×4.6)×12.5