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

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.