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下面的题,你能简算吗?3.42×5.7+4.3×3.428.75×11-8.757.42×20.15.9×2.7+0.59×730.8×(4-3.75)×9.911.248-4.6×3.8=50×0.125×0.02×8

题目详情
下面的题,你能简算吗?
3.42×5.7+4.3×3.42           8.75×11-8.75         7.42×20.1
5.9×2.7+0.59×73                   0.8×(4-3.75)×9.911.248-4.6×3.8=
50×0.125×0.02×8             8.9×5.2+9.3
▼优质解答
答案和解析
(1)3.42×5.7+4.3×3.42
=3.42×(5.7+4.3)
=3.42×10
=34.2

(2)8.75×11-8.75 
=8.75×11-8.75×1
=8.75×(11-1)
=8.75×10
=87.5

(3)7.42×20.1
=7.42×(20+0.1)
=7.42×20+7.42×0.1
=148.4+0.742
=149.142


(4)5.9×2.7+0.59×73 
=5.9×2.7+5.9×7.3
=5.9×(2.7+7.3)
=5.9×10
=59
(5)0.8×(4-3.75)×9.9
=0.8×0.25×9.9
=0.2×9.9
=1.98

(6)11.248-4.6×3.8
=11.248-17.48
=-6.232

(7)50×0.125×0.02×8
=(50×0.02)×(0.125×8)
=1×1
=1

(8)8.9×5.2+9.3
=46.28+9.3
=55.58