Вычислите по действиям: (5/18+7/12)*2 10/31+1 13/51: (4/17-20\51)

(5/18+7/12)*2 10/31+1 13/51:(4/17-20\51)=

5/18+7/12=10/36+21/36=31/36

2 10/31=72/31

31/36* 72/31=72/36=2

4/17-20/51=12/51-20/51=-8/51

1 13/51=64/51

64/51:(-8/51)=-64/51*51/8=-64/8=-8

2+(-8)=2-8=-6