2 câu trả lời
$\dfrac{2}{6}$ + $\dfrac{3}{4}$ = $\dfrac{8}{24}$ + $\dfrac{18}{24}$ = $\dfrac{26}{24}$ = $\dfrac{13}{12}$
$\dfrac{5}{2}$ + $\dfrac{1}{6}$ = $\dfrac{30}{12}$ + $\dfrac{2}{12}$ = $\dfrac{32}{12}$ = $\dfrac{8}{3}$
$\dfrac{1}{7}$ + $\dfrac{6}{14}$ = $\dfrac{2}{14}$ + $\dfrac{6}{14}$ = $\dfrac{8}{14}$ = $\dfrac{4}{7}$
$\dfrac{2}{5}$ + $\dfrac{3}{5}$ = $\dfrac{2 + 3}{5}$ = $\dfrac{5}{5}$ = 1
~Chúc bạn học tốt nhé~
Giải thích các bước giải:
`2/6 + 3/4`
`= 4/12 + 9/12`
`= 13/12`
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`5/2 + 1/6`
`= 15/6 + 1/6`
`= 16/6 = 8/3`
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`1/7 + 6/14`
`=1/7 + 3/7`
`= 4/7`
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`2/5 + 3/5`
`= 5/5= 1`