Question

Помоги пожалуйста дам 30 балов только помогите пожалуйста ​

Answer 1

1) 2 5/7 - 1 3/5 = 2 25/35 - 1 21/35 = 1 4/35;

2) 1 4/35 : 1,3 = 1 4/35 : 1 3/10 = 39/35 : 13/10 = 39/35 * 10/13 = 3/7 * 2/1 = 6/7;

3) 2/5 - 7/18 = 36/90 - 35/90 = 1/90;

4) 1/90 * 15 = 1/90 * 15/1 = 1/6 * 1/1 = 1/6;

5) 1 3/7 * 0,25 = 1 3/7 * 25/100 = 1 3/7 * 1/4 = 10/7 * 1/4 = 5/7 * 1/2 = 5/14;

6) 5/14 : 1/6 = 5/14 * 6/1 = 5/7 * 3/1 = 15/7 = 2 1/7;

7) 6/7 - 2 1/7 = 6/7 - 1 8/7 = - 1 2/7.

Ответ: - 1 2/7.