Đáp án:
Giải thích các bước giải:
14.
a, $\frac{55}{66}$ = $\frac{55:11}{66:11}$ = $\frac{5}{6}$
b, $\frac{-33}{88}$ = $\frac{-33:11}{88:11}$ = $\frac{-3}{8}$
c, $\frac{2020}{8080}$ = $\frac{2020:2020}{8080:2020}$ = $\frac{1}{4}$
d, $\frac{-2121}{-4242}$ = $\frac{-2121:2121}{-4242:2121}$ = $\frac{1}{2}$
e, $\frac{130130}{-260260}$ = $\frac{130130:130130}{-260260:130130}$ = $\frac{-1}{2}$
f, $\frac{1616}{-1313}$= $\frac{1616:101}{-1313:101}$= $\frac{16}{-13}$
