1)вычислите 2 6/7*9*3 1/9
2) (7 5/12-6 13/16)*(5*1 20/29​

ответ:

2 6/7*9*3 1/9 = 20/7 • 9/1 • 28/9 = 180/7 • 28/9 = 20/1 • 4/1 = 80

2) (7 5/12-6 13/16)*(5*1 20/29) = 3 479/1392

1) 7 5/12-6 13/16 = 7 20/48 - 6 49/48 = 19/48

2) (5*1 20/29) = 5/1 • 49/29 = 245/29

3) 19/48 • 245/29 = 4655/1392