Question

помогите даю 50 баллов​

Answer 1

Ответ:

$\displaystyle \frac{13}{50}+\frac{12}{50}+\frac{2}{50}=\frac{13+12+2}{50}=\frac{27}{50}\\\\\\\frac{56}{100}+\frac{15}{100}-\frac{9}{100}=\frac{56+15-9}{100}=\frac{62}{100}=\frac{2\cdot 31}{2\cdot 50}=\frac{31}{50}\\\\\\\frac{9}{25}+\frac{6}{25}+\frac{3}{25}=\frac{9+6+3}{25}=\frac{18}{25}$