3.29+0.73+2.27 3.29-0.73-2.27 7.5+2.5-7.5+2.5
7.325-3.29-3.3257.325-(5.325+1.7) 7.325-(5.325-1.7)
3.29+0.73-2.29+2.27 3.29×0.25×4 0.125×8.8
0.25×0.28 0.125×3.2×2.5 35×10.2 0.25×4÷0.25×4
3.5×9.93.5×99+3.5
3.5×101-3.5 3.5×9.9+3.5×0.1 3.5×2.7+35×0.73
3.5×2.7-3.5×0.7 (32+5.6)÷0.8 3.5÷0.6-0.5÷0.6
4.9÷1.4 7÷0.25÷4 7÷0.125
7.35÷(7.35×0.25) 7.35÷(7.35÷0.25)
3.07-0.38-1.62 1.29+3.7+2.71+6.3
8-2.45-1.55 3.25+1.79-0.59+1.75
23.4-0.8-13.4-7.2 0.32×403
3.2+0.36+4.8+1.64 1.23+3.4-0.23+6.6 0.25×36
12.7-(3.7+0.84) 36.54-1.76-4.54 0.25×0.73×4
7.6×0.8+0.2×7.6 0.85×199 0.25×8.5×4
1.28×8.6+0.72×8.6 12.5×0.96×0.8 10.4-9.6×0.35
0.8×(4.3×1.25) 3.12+3.12×99 28.6×101-28.6
(4.23+6.17)×0.8 0.86×15.7-0.86×14.7 2.4×102
14-7.32-2.68 2.64+8.67+7.36+11.332.31×1.2×0.5
(2.5-0.25)×0.49.16×1.5-0.5×9.16
3.6-3.6×0.54.5÷1.8 930÷0.6÷5
63.4÷2.5÷0.4 4.25÷2.5×9.9+0.17
3.9÷(1.3×57.7+1.54)÷0.7
2.5×2.4 2.7÷45
0.35×1.25×2×0.8 32.4×0.9+0.1×32.4
15÷0.2515÷(0.15×0.4)
小學數學五年級上冊簡便計算練習(答案卷)
一、歸類練習:
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 =3.29-30+5
=6.290.295
(加法結合律減法的性質同級運算交換)
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
=0.710.33.7
(減法交換減法的性質前面減號,脫括號變符號)
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+33.29×1 =1×1.1
=43.291.1
(同級運算交換乘法結合律先拆數,乘法結合律)
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 =1×135×10+35×0.2
=0.071350+7
(先拆數,乘法結合律) (拆數,乘法結合律357
拆數,乘法分配律)
0.25×4÷0.25×43.5×9.93.5×99+3.5
=(0.25÷0.25)×(4×4)=3.5×(10-0.1)=3.5×(99+1)
=1×163.5×10-3.5×0.13.5×100
=1635-0.35350
(同級運算交換34.65乘法分配律)
拆數,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
=3.5×1003.5×103.5×(2.7+7.3)
=350353.5×10
(乘法分配律乘法分配律35
先利用積不變的規律轉化,
然後再用乘法分配律)
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
=3.5×240+73÷0.6
=7475
(乘法分配律後2題類似分配律,但只適用於(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÷0.27÷156
=0.7÷0.27乘除法轉化規律,轉化時
=3.5符號相反,轉化前後的2數
(拆數,除法的性質除法的性質相乘得1。)
7.35÷(7.35×0.257.35÷(7.35÷0.25)
=7.35÷7.35÷0.257.35÷7.35×0.25
=1÷0.251×0.25
=40.25
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