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3.41-1.97+0.49-1.03的简便计算
人气:169 ℃ 时间:2020-05-20 04:45:31
解答
3.41-1.97+0.49-1.03
=(3.41+0.49)-(1.97+1.03)
=3.9-3
=0.9
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