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0.67+0.3-0.67+0.3怎样简算.
人气:248 ℃ 时间:2020-03-25 00:42:06
解答
0.67+0.3-0.67+0.3
=0.67-0.67+0.3+0.3
=0.3+0.3
=0.6
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