Question

Вычислите: а) 1-25/28; б) 9-4/21; в) 10-8 1/7; г) 11-1 5/8.

Answer 1

А   −699
б  8.81
в  -1.57
г  9.125

Answer 2

а) 1 - 25/28 = (28/28) - (25/28) = (28 - 25) / 28 = 3/28

б) 9 - 4/21 = (189/21) - (4/21) = (189 - 4) / 21 = 185/21

в) 10 - 8 + 1/7 = 2 + 1/7 = (14/7) + (1/7) = 15/7 = 2 1/7

г) 11 - 1 + 5/8 = 10 + 5/8 = (80/8) + (5/8) = 85/8