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5.4×3.8-6.5×5.4+2.7×5.4= 递等式计算简便
人气:384 ℃ 时间:2019-09-26 00:17:12
解答
5.4×3.8-6.5×5.4+2.7×5.4
=5.4×(3.8-6.5+2.7)
=5.4×0
=0
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