Question

помогите плиз дам 70 балов

Answer 1

Ответ:

Пошаговое объяснение:

5.

1) 2. 2/5 * 5/6 = 12/5 * 5/6 = 12/6 = 2

2) 3/4 * 1. 2/3 = 3/4 * 5/3 = 5/4 = 1. 1/4

3) 2 - 1. 1/4 = 1. 4/4 - 1. 1/4 = 3/4

6.

1) 1. 17/28 * 14/9 = 45/28 * 14/9 = 5/2 * 1/1 = 5/2 = 2. 1/2

2) 14/25 * 5/7 = 2/5 * 1/1 = 2/5

3) 2. 1/2 + 2/5 = 2. 5/10 + 4/10 = 2. 9/10