3/5 + 7/5 6/2 + 10/2 3/5 + 7/8 12/121 + 6/11

Đáp án `+` Giải thích các bước giải:

`3/5+7/5`

`=(3+7)/5`

`=10/5`

`=2`

`6/2+10/2`

`=(6+10)/2`

`=16/2`

`=8`

`3/5+7/8`

`=24/40+35/40`

`=(24+35)/40`

`=59/40`

`12/121+6/11`

`=12/121+66/121`

`=(12+66)/121`

`=78/121`

$\dfrac{3}{5}$ + $\dfrac{7}{5}$ = $\dfrac{3 + 7}{5}$ = $\dfrac{10}{5}$ = 2

$\dfrac{6}{2}$ + $\dfrac{10}{2}$ = $\dfrac{6 + 10}{2}$ = $\dfrac{16}{2}$ = 8

$\dfrac{3}{5}$ + $\dfrac{7}{8}$ = $\dfrac{3 × 8}{5 × 8}$ + $\dfrac{7 × 5}{8 × 5}$  = $\dfrac{24}{40}$ + $\dfrac{35}{40}$ = $\dfrac{59}{40}$

$\dfrac{12}{121}$ + $\dfrac{6}{11}$ = $\dfrac{12}{121}$ + $\dfrac{6 × 11}{11 × 11}$ = $\dfrac{12}{121}$ + $\dfrac{66}{121}$ = $\dfrac{78}{121}$

$\text{Xin hay nhất}$