3.85+6.42-1.78怎样算简便?
人气:336 ℃ 时间:2020-06-08 02:41:37
解答
3.85+6.42-1.78
=3.85+6.15+0.27-1.78
=10+0.27-2+0.22
=8+0.49
=8.49
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