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简便计算6.8*3.4+15.9*3.2
人气:240 ℃ 时间:2020-01-31 14:32:38
解答
6.8*3.4+15.9*3.2
=(10-3.2)*3.4+15.9*3.2
=10*3.4+(15.9-3.4)*3.2
=34+12.5*3.2
=74
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