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括号1/10+1/4括号乘以1/7怎么脱式计算

(1/10+1/4)x1/7 =(2/20+5/20)x1/7 =7/20x1/7 =1/20 希望能帮到你

2/5×[1/5+8/21÷(4/7)] =2/5x(1/5+2/3) =2/5x(13/15) =26/75

八除以1+7括号括回列脱式计算怎么做 8÷(1+7) =8÷8 =1. 请采纳,谢谢.

28÷(1/4-1/7) =28÷3/28 =28×28/3 =784/3

(-1-1/4×8/9)÷7/9 =(-1×9/7)-(1/4×9/7)×(8/9×9/7) =-9/7-9/28×8/7 =-36/28-9/28×8/7 =-36/28-36/98 =-63/49-18/49 =-81/49

80/72

4x=8/7*(1/5-1) 4x=8/7*(-4/5) 4x=-32/35 x=-32/35*1/4 x=-8/35 谢谢,请采纳

7/8-(2/5+1/10) =7/8-1/2 =3/8

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