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用简便方法计算:20又四分之一×19又四分之三
人气:486 ℃ 时间:2020-04-13 11:35:19
解答
寒樱暖暖为你
20又1/4×19又3/4
=(20+1/4)×(20-1/4)
=20×20-1/4×1/4
=400-1/16
=399又16分之15
您的采纳是我前进的动力,也能给你带去财富值……
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