2018-01-03
展开全部
3.6×2.5+6.4×2.4脱式计算
解:
采用凑整法和分配律,
原式=3.6×2.5+6.4×2.4
=3.6×2.5+6.4×2.5-6.4x0.1
=(3.6+6.4)x2.5-0.64
=10x2.5-0.64
=25-0.64
=24.36
解:
采用凑整法和分配律,
原式=3.6×2.5+6.4×2.4
=3.6×2.5+6.4×2.5-6.4x0.1
=(3.6+6.4)x2.5-0.64
=10x2.5-0.64
=25-0.64
=24.36
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