简便运算五年级上册100道

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一、归类练习:
3.29+0.73+2.27 3.29-0.73-2.27 7.5+2.5-7.5+2.5
=3.29+(0.73+2.27) =3.29-(0.73+2.27) =(7.5-7.5)+(2.5+2.5)
=3.29+3 =3.29-3 =0+5
=6.29 =0.29 =5
(加法结合律)(减法的性质)(同级运算交换)
7.325-3.29-3.325 7.325-(5.325+1.7) 7.325-(5.325-1.7)
=7.325-3.325-3.29 =7.325-5.325-1.7 =7.325-5.325+1.7
=4-3.29 =2-1.7 =2+1.7
=0.71 =0.3 =3.7
(减法交换)(减法的性质)(前面减号,脱括号变符号)
3.29+0.73-2.29+2.27 3.29×0.25×4 0.125×8.8
=(3.29-2.29)+(0.73+2.27) =3.29×(0.25×4) =0.125×8×1.1
=1+3 =3.29×1 =1×1.1
=4 =3.29 =1.1
(同级运算交换)(乘法结合律)(先拆数,乘法结合律)
0.25×0.28 0.125×3.2×2.5 35×10.2
=0.25×4×0.07 =(0.125×8)×(0.4×2.5) =35×(10+0.2)
=1×0.07 =1×1 =35×10+35×0.2
=0.07 =1 =350+7
(先拆数,乘法结合律)(拆数,乘法结合律) =357
(拆数,乘法分配律)0.25×4÷0.25×4 3.5×9.9 3.5×99+3.5
=(0.25÷0.25)×(4×4) =3.5×(10-0.1) =3.5×(99+1)
=1×16 =3.5×10-3.5×0.1 =3.5×100
=16 =35-0.35 =350
(同级运算交换)=34.65 (乘法分配律)
(拆数,乘法分配律)
3.5×101-3.5 3.5×9.9+3.5×0.1 ★3.5×2.7+35×0.73
=3.5×(101-1) =3.5×(9.9+0.1) =3.5×2.7+3.5×7.3
=3.5×100 =3.5×10 =3.5×(2.7+7.3)
=350 =35 =3.5×10
(乘法分配律)(乘法分配律) =35
(先利用积不变的规律转化,然后再用乘法分配律)
3.5×2.7-3.5×0.7 ★(32+5.6)÷0.8 ★3.5÷0.6-0.5÷0.6
=3.5×(2.7-0.7) =32÷0.8+5.6÷0.8 =(3.5-0.5)÷0.6
=3.5×2 =40+7 =3÷0.6
=7 =47 =5
(乘法分配律)(后2题类似分配律,但只适用于(a+b)÷c和(a-b)÷c,而a÷(b+c)和a÷(b -c)不能用。


4.9÷1.4 7÷0.25÷4 ★ 7÷0.125
=4.9÷(7×0.2) =7÷(0.25×4) =7×8
=4.9÷7÷0.2 =7÷1 =56
=0.7÷0.2 =7
=3.5
(拆数,除法的性质)(除法的性质)(乘除法转化规律,转化时符号相反,转化前后的2数相乘得1。


7.35÷(7.35×0.25) ★7.35÷(7.35÷0.25)
=7.35÷7.35÷0.25 =7.35÷7.35×0.25
=1÷0.25 =1×0.25
=4 =0.25
(除法的性质)(前面是除号,脱括号符号相反)
二、混合练习:
3.07-0.38-1.62 1.29+3.7+2.71+6.3 8-2.45-1.55
=3.07-(0.38+1.62) =(1.29+2.71)+(3.7+6.3) =8-(2.45+1.55)
=3.07-2 = 4+10 =8-4
=1.07 =14 =4(减法的性质)(加法交换律和加法结合律)(减法的性质)
五年级上册小数简便计算100题练习
73.8-1.64-13.8-5.36 66.86-8.66-1.34
36.8-3.9-6.1 2 13.75-(3.75+6.48)
5.48-(9.4-0.52) 3.9-4.1+
6.1-5.9
4.02+
5.4+0.98 5.17-1.8-3.2
3.68+7.56-2.68 7.85+2.34-0.85+
4.66 3
5.6-1.8-15.6-7.2 47.8-7.45+8.8
3.82+2.9+0.18+9.1 9.6+
4.8-3.6
7.14-0.53-2.47 13.35-4.68+2.65
5.27+2.86-0.66+1.63 0.398+0.36+3.64 15.75+3.59-0.59+14.25 132-43.7-5
6.3 12.25-3.1+0.85-6.17 6.3+4.82+3.7-0.82 48.4+2.78+51.6-0.48
7.3+2.7-7.3+2.7
3.6-3.6×0.8 3.72×3.5+6.28×3.5
4.8×7.8+78×0.52 18.76×9.9+1.876
56.5×9.9+5.65 7.09×10.8-0.8×7.09
4.2×99+4.2 9.7×99+9.74.
4.8-4.8×0.5 (1.25-0.125)×8
20.5-1.074-8.35×5.5 5.6×1.25
4.36×12.5×8
5.83×2+4.27
15.6×13.1-15.6-15.6×2.1 27.5×3.7-7.5×3.7 3.4×0.46+3.4×0.54 0.32×12.5×2.5
7.6×27+7.6×174-7.6 1.5×1.2+8.8×1.5
3.5×0.4+3.5×0.6 7.12×4-1.12×4
2.65×1.7+1.35×1.7 2.5×(6.2-2.6)×0.4 26.7-0.5×5-7.5 4.7×8.3+5.2×8.3+0.83 48.4+2.78+51.6-0.48
3.72×9.9+3.72×0.1 0.99×0.81+0.99×0.19+0.99
1.39×25-0.039×250 (
2.5-0.25)×0.4
(4.16+4.16+4.16+4.16)×2.5 3.78×99+3.78
1.25×2×0.37×4 1.25×8-0.025×80
12.6-(2.89+7.11)×1.01 [18.95-(8.43+3.87)]×2.8 [18.95-(8.43+3.87)]×2.8
4.2÷3.5 320÷1.25÷8 3.52÷2.5÷0.4
4.78÷0.2+3.44 8.54÷2.5÷0.4
6.4×0.25+3.6÷4 15.2÷0.25÷4
9.6÷0.8÷0.4 17.8÷(1.78×4)
(45.9-32.7)÷8÷0.125 52.8÷0.75×0.25
(7.7+15.4)÷7 5.4×0.75÷1.
3.68÷
4.6+6.32 72÷1.25÷8
25.5÷[(10-8.98)×2.5] 450÷2.5÷2
39÷(1.3×5) 2.2÷4+0.6÷4
4.83÷5+2.17÷5
(1.9-1.9×0.9)÷(3.8-2.8) 2.3÷0.25÷0.4 65÷(0.65×4) 5.4×0.75÷1.5
2.6×0.5+7.4÷2 (2.31+6.69)÷0.03
8.54÷2.5÷0.4 630÷[2.98+6.5×(3.2-3.12)]。

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