递等式计算,能简便的要简便计算(求学霸帮忙) 34.8÷2.5 17.48×3_百度...
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发布时间:2024-10-02 10:53
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时间:2024-10-09 14:32
34.8÷2.5
=(34.8×4)÷(2.5×4)
=139.2÷10
=13.92
17.48×37-174.8×7.9+1.748×820
=17.48×37-17.48×79+17.48×82
=17.48×(37-79+82)
=17.48×40
=699.2
4.48÷2.5×0.04
=1.792×0.04
=0.07168
12.5×0.48×0.25
=(12.5×0.8)×(0.6×0.25)
=10×0.15
=1.5