9分之5乘10分之3加7分之2除以5分之3 财富值87

2016-11-07 12:08发布

4条回答
请你采纳
(5/9)X(3/10)+ (2/7)÷(3/5)
= 1/6 + (2/7)X(5/3)
= 1/6 + 10/21
= 7/42+ 20/42
= 27/42
= 9/14
请采纳

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