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50.4*1.9-1.8简便运算
人气:372 ℃ 时间:2020-02-05 21:38:01
解答
50.4×1.9-1.8
=50.4(2-0.1)-1.8
=50.4×2-5.04-1.8
=100.8-1.8-5.04
=99-5.04
=93.96
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