Question

Podem me ajuda no 11,12 preciso muito ... obg ♡♡♡♡♡♡♡♡

Answer 1

a) = $\frac{9}{12}$+$\frac{4}{12}$-$\frac{2}{12}$ = $\frac{15}{12}$ = $\frac{5}{4}$
b) = $\frac{1}{2}$+$\frac{1}{4}$ = $\frac{2}{4}$+$\frac{1}{4}$ = $\frac{3}{4}$
c) = $\frac{6}{12}$+$1\frac{4}{12}$-$1\frac{3}{12}$ = $\frac{6}{12}$+$\frac{1}{12}$ = $\frac{7}{12}$
d) = $\frac{33}{36}$-$\frac{30}{36}$+$\frac{8}{36}$ = $\frac{33}{36}$-$\frac{38}{36}$ = $- \frac{5}{36}$