简便计算:
4.7×0.35+0.47×4.2+0.047×23.
人气:412 ℃ 时间:2020-06-12 09:10:48
解答
4.7×0.35+0.47×4.2+0.047×23
=4.7×0.35+4.7×0.42+4.7×0.23
=4.7×(0.35+0.42+0.23)
=4.7×1
=4.7.
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