Question

11/12!МАТЕМАТИКА!СРОЧНО!

Answer 1

Задание 11.

A. $C ( frac{2 +8}{2}  ) = (5)$

Б. $C ( frac{-2-8}{2} ) = (-5)$

Задание 12.

A.  $B _{1} = (- frac{2}{3} - frac{1}{3} )= (- frac{3}{3} ) = (-1)$

$B _{2} = (- frac{2}{3} + frac{1}{3} ) = (- frac{1}{3} )$

Б. $A _{1} =( frac{1}{3} +3 frac{5}{6} ) = ( frac{2}{6} +3 frac{5}{6} )= (4 frac{1}{6})$

$A_{2} = ( frac{1}{3} -3 frac{5}{6} ) = ( frac{2}{6} - 3 frac{5}{6} )= (-3 frac{3}{6} )=(-3 frac{1}{2} )$