58.7*6.8+6.8*40+6.8简便计算
人气:155 ℃ 时间:2019-12-13 17:59:07
解答
58.7*6.8+6.8*40+6.8
=6.8(58.7+40+1)
=6.8*(59+40+1-0.3)
=6.8*(100-0.3)
=680-2.04
=677.96谢谢啦
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