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48乘以0.25乘以1.25(简便计算)
人气:168 ℃ 时间:2020-03-16 12:51:23
解答
48×0.25×1.25
=(40+8)×0.25×1.25
=40×0.25×1.25+8×0.25×1.25
=12.5+2.5
=15
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