1

a)2_

12

5

b)9-

42

1

c)10-

90

e)19

Verified answer

Ответ:

Пошаговое объяснение:

а)

1) 2/15 + 1. 7/12 = 8/60 + 1. 35/60 =

1. 43/60

2) 1. 43/60 * 30/103 = 103/60 * 30/103 = 30/60 = 1/2

3) 2 : 2. 1/4 = 2 : 9/4 = 2 * 4/9 = 8/9

4) 8/9 * 9/32 = 8/32 = 1/4

5) 1/2 - 1/4 = 2/4 - 1/4 = 1/4

6) 1/4 + 2. 1/3 = 3/12 + 2. 4/12 = 2. 7/12