99.6×0.4+0.16巧算

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99.6×0.4+0.16巧算99.6×0.4+0.16巧算99.6×0.4+0.16巧算=99.6×0.4+0.4×0.4=(99.96+0.4)×0.4=100×0.4=40一楼正解!!原式转化为

99.6×0.4+0.16巧算
99.6×0.4+0.16
巧算

99.6×0.4+0.16巧算
=99.6×0.4+0.4×0.4
=(99.96+0.4)×0.4
=100×0.4
=40

一楼正解!!

原式转化为:
(100-0.4)×0.4+0.16
=40-0.16+0.16
=40

(100-0.4)×0.4+0.16=100×0.4-0.4×0.4+0.16=40