Question

29分之7*8分之3+29分之6*12分之7+29分之3*9分之7

Answer 1

(7/29)*(3/8)+(6/29)*(7/12)+(3/29）*（7/9)
解，得：
==(1/29)*7*(3/8)+6*(1/29)*(7/12)+3*(1/29）*（7/9)
==(1/29)*[7*(3/8)+6*(7/12)+3*（7/9)]
==(1/29)*[(21/8)+(7/2)+（7/3)]
==(1/29)*[(21/8)+(7/2)+（7/3)]
==(1/29)*(203/24)
==7/24

追问

能不能简算？

追答

@，@这道题已经简算一部分了的~

追问

有没有另一种方法，再列一个满意答案就是你的了！

追答

(7/29)*(3/8)+(6/29)*(7/12)+(3/29）*（7/9)
解，得：
==(21/29)*(1/8)+(21/29)*(2/12)+(21/29)(1/9)
==(21/29)*(1/8)+(21/29)*(1/6)+(21/29)(1/9)
==(21/29)*[(1/8)+(1/6)+(1/9)]
==(21/29)*[(7/24)+(1/9)]
==(21/29)*(7/24)+(21/29)*(1/9)
==(7/29)*(7/8)+(7/29)*(1/3)
==(7/29)*[(7/8)+(1/3)]
==(7/29)*(29/24)
==7/24

Answer 2

7/29*3/8+6/29*7/12+3/29*7/9
=7/29*3/8+7/29*6/12+7/29*3/9
=7/29(3/8+1/2+1/3)
=7/29*(9+12+8)/24
=7/29*29/24
=7/24

Answer 3

7/29×3/8+6/29×7/12+3/29×7/9

=7/29×3/8+7/29×6/12+7/29×3/9

=7/29(3/8+1/2+1/3)

=7/29×(9+12+8)/24

=7/29×29/24

=7/24