Выполните действие: 2 2/5*5/6-3/4*1 2/3 .6)1 17/28*14/9+14/25*5/7

Question

Выполните действие: 2 2/5*5/6-3/4*1 2/3 .6)1 17/28*14/9+14/25*5/7

Answer 1

2 2/5×5/6-3/4×1 2/3=12/5×5/6-3/4×5/3=
=2-5/4=2 -1 1/4=3/4

1 17/28×14/9+14/25×5/7=
=45/28×14/9+14/25×5/7=5/2+2/5=25/10+4/10=
=29/10=2 9/10