Ответ:

Пошаговое объяснение:

1) 3 75/100- 29/7 = 3 15/20 - 29/7 = 75/20-29/7= 525/140- 580/140 = - 55/140 = - 11/28

2) (-2.47)+0.72 = - 1.75

3) (-11/28)× 14/11 = - 1/2

4) 25/12 : (-1.75) = 25/12: (- 1 15/20) = 25/12 :(-35/20) = 25/12×(-20/35) = -500/420= -50/42= -25/21

5) - 1/2-(-25/21) = -21/42 + 50/42 = 26/42 = 13/21

Ответ 13/21

7) 0.7 = 7/10