$\text{Đáp án:}$
$\text{a}$
`5/6`=$\dfrac{5×4}{6×4}$=`20/24`
`1/4`=$\dfrac{1×6}{4×6}$=`6/25`
$\text{b}$
`3/7`=$\dfrac{3×7}{5×7}$=`21/35`
`3/7`=$\dfrac{3×5}{7×5}$=`15/35`
$\text{c}$
`9/8`=$\dfrac{9×9}{8×9}$=`81/72`
`8/9`=$\dfrac{8×8}{9×8}$=`64/72`
$\text{a}$
`7/5`=$\dfrac{7×11}{5×11}$=`77/55`
`8/11`=$\dfrac{8×5}{11×5}$=`40/55`
$\text{b}$
`5/12`=$\dfrac{5×8}{12×8}$=`40/96`
`3/8`=$\dfrac{3×12}{8×12}$=`36/96`
$\text{c}$
`17/10`=$\dfrac{17×7}{10×7}$=`119/70`
`9/7`=$\dfrac{9×10}{7×10}$=`90/70`
$\text{chúc bn học tốt nha}$
