Ответ:

Пошаговое объяснение:

1) 14 1/8 - 3/8 = 13 9/8 - 3/8 = 13 6/8 = 13 3/4

2) 20 5/9 + 3 4/9 = 23 9/9 = 24

3)( 15 4/7 + 3/7) + 20 = 15 7/7 + 20 = 16 + 20 = 36

4) 16 2/9 - 4 5/9 = 15 11/9 - 4 5/9 = 11 6/9 = 11 2/3

5) 80 - 23 3/7 = 79 7/7 - 23 3/7= 56 4/7

6) (30 1/4 + 15 3/4) + 7 5/13 = 45 4/4 + 7 5/13 = 46 + 7 5/13 = 53 5/13

№2

а) 48/5 = 9 3/5

б) 251/6 = 41 4/6 = 41 2/3

в) 89/70 = 1 19/70

№3

30 * 3/5 = 30 : 5 * 3 = 18

№4

600 * 4% : 100% = 24