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3.28-(2.2-1,28)怎样用简便方法计算
人气:236 ℃ 时间:2020-02-05 09:46:15
解答
3.28-(2.2-1.28)
=3.28-2.2+1.28
=3.28+1.28-2.2
=4.56-2.2
=2.36
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