Question

помогитеееее пжжжжжжжжж

Answer 1

$- 3 frac{3}{4} times + 2 frac{1}{2} = - frac{15}{4} + frac{5}{2} = - frac{15 + 10}{4} = - frac{5}{4} = - 1 frac{1}{4}$

Answer 2

помогите в 1 картинке

Answer 3

5/9+(-8/9)= -(8/9-5/9)=-1/3
-3, 3/4+2, 1/2=-3, 3/4+2, 2/4=-(3, 3/4-2, 2/4)=-1, 1/4.