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(7.8-4.6)*12.5*0.25(简便运算)
人气:139 ℃ 时间:2020-01-31 19:21:39
解答
(7.8-4.6)*12.5*0.25
=3.2*12.5*0.25
=0.8*12.5*4*0.25
=10
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