(15 分之1+49分之3)乘15-49分之45
简算
8乘(8分之3+27分之1)+27分之19
人气:487 ℃ 时间:2020-06-27 06:55:15
解答
(1/15+3/49)*15-45/49
=1+45/49-45/49
=1
8*(3/8+1/27)+19/27
=3+8/27+19/27
=3+1
=4
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