Question

помогите пожалуйста даю 15баллов (5 5/7 * 3/8 - 5 1/4 / 7) / 3 + 3 3/28 * 1/2​

Answer 1

(5 5/7 * 3/8 - 5 1/4 : 7) : 3 + 3 3/28 - 1/2 = 3 целых 1/14

1) 5 5/7 * 3/8 = 40/7 * 3/8 = (5*3)/(7*1) = 15/7 = 2 1/7

2) 5 1/4 : 7 = 21/4 : 7 = 21/4 * 1/7 = (3*1)/(4*1) = 3/4

3) 2 1/7 - 3/4 = 2 4/28 - 21/28 = 1 32/28 - 21/28 = 1 11/28 = 39/28

4) 39/28 : 3 = 39/28 * 1/3 = (13*1)/(28*1) = 13/28

5) 13/28 + 3 3/28 = 3 16/28 = 3 4/7

6) 3 4/7 - 1/2 = 3 8/14 - 7/14 = 3 1/14