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1.25*5.3+1.25*4.3-1.25*0.4怎么做
人气:455 ℃ 时间:2020-04-14 19:57:29
解答
1.25*5.3+1.25*4.3-1.25*0.4
=1.25*(5.3+4.3-0.4)
=1.25*9.2
=1.25*4*2.3
=5*2.3
=11.5
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