Question

Найдите значение выражения:
8-4,2*(2 5/14-1 4/21)

Answer 1

8-4,2*(2 5/14-1 4/21)
1)2 5/14 -14/21=2 15/42 - 28/42=1 57/42 – 28/42 = 1 29/42
2)4 2/10 *1 29/42 = 71/10 = 7 1/10
3)8 – 7 1/10 = 7 10/10 – 7 1/10 = 9/10