Question

Найдите значение выражения : (1 -7/8+ 7/10):3/8 - 2/5

Answer 1

(1 -7/8+ 7/10):3/8 - 2/5 = 2 4/15
1) 1 - 7/8 = 8/8 - 7/8 = 1/8
2) 1/8 + 7/10 = 5/40 + 35/40 = 40/40 = 1
3) 1 / 3/8 = 1 * 8/3 = 8/3 = 2 2/3
4) 2 2/3 - 2/5 = 2 10/15 - 6/15 = 2 4/15