Question

помогите пожалуйста!!!!​

Answer 1

$\displaystyle 6 \frac{5}{14} -5 \frac{8}{21}= \frac{89}{14} - \frac{113}{21}= \frac{41}{42}$

Или

$\displaystyle 6\frac{5}{14}-5\frac{8}{21}=\frac{41}{42} \\\\\\1)\;\;6\frac{5}{14} = \frac{6*14+5}{14} = \frac{84+5}{14} = \frac{89}{14} \\\\\\2)\;\;5 \frac{8}{21} = \frac{5*21+8}{21} = \frac{105+8}{21} = \frac{113}{21}\\\\\\ 3)\;\; \frac{89}{14} - \frac{113}{21} = \frac{267-226}{42} = \frac{41}{42}$