Найдите значение выражения а-б

[latex] \frac{4}{5}- \frac{9}{1}= \frac{4-45}{5}=- \frac{41}{5}=-8 \frac{1}{5} [/latex] [latex] 15,8-36,3=-20,5 [/latex] [latex]19 \frac{4}{7}- (-9\frac{3}{14})= \frac{137}{7}+ \frac{129}{14}= \frac{274+129}{14}= \frac{403}{14}=28 \frac{11}{14} [/latex] [latex]-8,47-(-12,47)=4[/latex] [latex]0-(-21,6)=21,6[/latex] [latex]0-200,3=-200,3[/latex]