Ответ:

Пошаговое объяснение:

а) 25 × (7/10 - 3/5 + 1/2) = 25 × (7/10 - 6/10 + 5/10) = 25 × 6/10 = 25 × 3/5 = 5×3=15

б) (3/5 - 4/15) × (1/2 - 1/3) = (9/15 - 4/15) × (3/6 - 2/6) = 5/15 × 1/6 = 1/3 × 1/6 = 1/18

в) 7/29 × 10 + 19 × 7/29 = 70/29 + 133/29 = 203/29 = 7

г) 10 - 5 × 6/5 - 1/3 = 10 - 6 - 1/3 = 4 - 1/3 = 3целых 3/3 - 1/3 = 3целых 2/3

д) 1/2 + 3/4 × 8/15 - 3/10 = 1/2 + 1/1 × 2/5 - 3/10 = 1/2 + 2/5 - 3/10 = 5/10 + 4/10 - 3/10 = 6/10 = 3/5

е) 11/34 × 8 + 9 × 11/34 = 88/34 + 99/34 = 187/34 = 5целых 17/34 = 5целых 1/2