Question

Вычислите 20/21(1 5/8-2/5)

Answer 1

1) 1 5/8-2/5=1 9/40
2) 20/21*1 9/40=1 1/6

Ответ: 1 1/6

Answer 2

20/21*(13/8-2/5)
20/21*(13/8-2/5)
20/21*49/40
1/3*7/2
7/6