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4/5*37.5%+3/8*32-0.375的简算
人气:280 ℃ 时间:2020-03-12 22:08:48
解答
4/5*37.5%+3/8*32-0.375
=4/5x3/8+3/8x32-3/8
=(4/5-1)x3/8+12
=12-1/5x3/8
=12-3/40
=11又 37/40
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