6.4+3.6×4.2简便计算
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6.4+3.6×4.2
=6.4+3.6×(4+0.2)
=6.4+3.6×4+3.6×0.2
=6.4+14.4+0.72
=21.52
咨询记录 · 回答于2022-04-07
6.4+3.6×4.2简便计算
6.4+3.6×4.2=6.4+3.6×(4+0.2)=6.4+3.6×4+3.6×0.2=6.4+14.4+0.72=21.52
(4-0.4)x0.25简便计算
(4-0.4)x0.25=4×0.25-0.4×0.25=1-0.1=0.9
谢谢!!!
亲,还有什么问题吗
非常感谢,今天没有了!!!
好的好的