72×60%-42×3/5(简算)
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72×60%-42×3/5(简算)
![72×60%-42×3/5(简算)](/uploads/image/z/19159241-41-1.jpg?t=72%C3%9760%25-42%C3%973%2F5%EF%BC%88%E7%AE%80%E7%AE%97%EF%BC%89)
72×60%-42×3/5
=72*3/5-42*3/5
=(72-42)*35
=30*3/5
=18
=72*3/5-42*3/5
=(72-42)*35
=30*3/5
=18
5/6+5/12+5/20+5/30+5/42+5/56+5/72(简算)
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求(7/12-1/5)*60 4/7*6/13+3/7*6/13 简算
1-6/5+12/7-20/9+30/11-42/13+56/15-72/17+90/19简算
(5分之3-2分之1-12分之7)乘以(60乘以7分之3-60乘以7分之1+60乘以7分之5),简算
简算1/30+1/42+1/56+1/72=?
简算:11/30-13/42+15/56-17/72
1/30+1/42+1/56+1/72 简算