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(7/25/7/5+4/25*5/4)/8/9简便计算快
人气:457 ℃ 时间:2020-01-29 01:26:06
解答
[(7/25)*(7/5)+(4/25)(5/4)]/(8/9)=[49/125+1/5]/(8/9)=(74/125)/(8/9)=(74/125)*(8/9)=666/1000=0.666
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