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5.264+2.354-6.99【用简便计算】
人气:458 ℃ 时间:2020-05-21 07:42:33
解答
5.264+2.354-6.99
=5.264+2.354-(7-0.01)
=5.264+2.354-7+0.01
=7.618-7+0.01
=0.618+0.01
=0.628
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