Question

Упростите каждый пример.

Answer 1

$a.\;\frac{3+(-7)}{-2}=\frac{3-7}{-2}=\frac{-5}{-2}=-\frac52=-2\frac12\\\\b.\;\frac{4-16}{-2\cdot(-2)}=\frac{-12}4=-3\\\\c.\;5(2+(-9))+(-25)=5\cdot(2-9)-25=\\=5\cdot(-7)-25 = -35-25 = -60\\\\d.\;-3(4)+5(4)-2(7)=-3\cdot4+5\cdot4-2\cdot7=-12+20-14=-6$