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3.5×99+4.62-9.9 简算
人气:474 ℃ 时间:2020-02-06 03:49:41
解答
=3.5*99+4.62-99*0.1
=99*(3.5-0.1)+4.62
=(100-1)*3.4+4.62
=340+(4.62-3.4)
=340+1.22
=341.22
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