Question

Помогите срочно даю 20
балов

Answer 1

Ответ:

Объяснение:

..... ....

Answer 2

Ответ:

$\displaystyle 2\frac{1}{3}\cdot \frac{3}{7}+1\frac{1}{4}=\frac{7}{3}\cdot \frac{3}{7}+1\frac{1}{4}=1+1\frac{1}{4}=2\frac{1}{4}=2,25\\\\\\5\frac{1}{8}\cdot \frac{4}{41}+1\frac{1}{3}=\frac{41}{8}\cdot \frac{4}{41}+\frac{4}{3}=\frac{1}{2}+\frac{4}{3}=\frac{3+8}{6}=\frac{11}{6}=1\frac{5}{6}$

$\displaystyle \frac{7}{9}:\frac{14}{45}-2\frac{1}{2}=\frac{7}{9}\cdot \frac{45}{14}-\frac{5}{2}=\frac{5}{2}-\frac{5}{2}=0\\\\\\\frac{3}{4}\cdot \frac{16}{21}+\frac{1}{14}=\frac{4}{7}+\frac{1}{14}=\frac{4\cdot 2+1}{14}=\frac{9}{14}$