Question

нужно мне Вычисли. Сравни
14/70 * 17/70-13/70
13/100 * 17/100+55/100
32/80 * 11/80+19/80
2/9 * 6/9-5/9
НУ

Answer 1

$\frac{17}{70}-\frac{13}{70}=\frac{17-13}{70}=\frac{4}{70}\\\\\frac{14}{70}\frac{4}{70}\;\;=\;\;\frac{14}{70}\frac{17}{70}-\frac{13}{70}\\\\\\\frac{17}{100}+\frac{55}{100}=\frac{17+55}{100}=\frac{72}{100}\\\\\ \frac{13}{70}\frac{13}{70}$

$\frac{11}{80}+\frac{19}{80}=\frac{11+19}{80}=\frac{30}{80}\\\\\frac{32}{80}\frac{30}{80}\;\;=\;\;\frac{32}{80}\frac{11}{80}+\frac{19}{80}$

$\frac{6}{9}-\frac{5}{9}=\frac{1}{9}\\\\\frac{2}{9}\frac{1}{9}\;\;=\;\;\frac{2}{9}\frac{6}{9}-\frac{5}{9}$