Question

-7/8*4/9+4/9*1/8;2(целых)2/9*3.7-2(целых)2/9*(-5.3);(1(целых)1/2-1(целых)1/7)*14;(2/5-3/4)*20 плиииииииииииз

Answer 1

1)-7/8*4/9+4/9*1/8=4/9*(-7/5+1/8)=4/9*(-6/8)=-1/3

2) 2 2/9*3,7-2 2/9*(-5,3)=2 2/9*(3,7-(-5,3)=2 2/9*(3,7+5,3)=2 2/9*9=
=20/9*9=20

3) (1 1/2-1 1/7)*14=(3/2-8/7)*14=(10/14-16/14)*14=-6/14*14=-6

4)(2/5-3/4)*20=(8/20-15/20)*20=-7/20*20=-7