(简便计算)(19+1/17)*7/18=1/(13/26又26/29)=

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(简便计算)(19+1/17)*7/18=1/(13/26又26/29)=(简便计算)(19+1/17)*7/18=1/(13/26又26/29)=(简便计算)(19+1/17)*7/18=1/(13

(简便计算)(19+1/17)*7/18=1/(13/26又26/29)=
(简便计算)
(19+1/17)*7/18=
1/(13/26又26/29)=

(简便计算)(19+1/17)*7/18=1/(13/26又26/29)=
(19+1/17)*7/18=(18+1+1/17)*7/18=(18+18/17)*7/18=18*7/18+18/17*7/18=7+7/17=7又7/17
1/(13/26又26/29)= 1/[13/(26*29+26)/29]=1/(13/26*30/29)=1/(13*29/26*30)=26*30/13*29=60/29

1. 74/567
2. 116/195

7.41
0.72

单据

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