Question

quanto é 1/3+1/4+1/2 ?

1. 1. 1
-. -. -
3. 4. 2​

Answer 1

$\begin{array}{r r r|l}\sf3&\sf4&\sf2&\sf2\\\sf3&\sf2&\sf1&\sf2\\\sf3&\sf1&\sf1&\sf3\\\sf1&\sf1&\sf1&\!\!\!\overline{~\:\sf2\cdot2\cdot3=12~}\end{array}$

$\mathsf{MMC(3,4,2)=12 }$

$\mathsf{ \dfrac{1}{3}+\dfrac{1}{4}+\dfrac{1}{2} =\dfrac{4}{12}+\dfrac{3}{12}+\dfrac{6}{12}}$

$\mathsf{ \dfrac{1}{3}+\dfrac{1}{4}+\dfrac{1}{2}=\dfrac{ 4+3+6}{12}}$

$\boxed{\boxed{\mathsf{ \dfrac{1}{3}+\dfrac{1}{4}+\dfrac{1}{2}=\dfrac{ 13}{12}}}}$

Answer 2

Vamos là.

1/3 + 1/4 + 1/2

mmc(3, 4, 2) = 12

2   3   4    2

1    3   2    2

1    3   1     3

1    1    1

mmc = 2*2*3 = 12

1/3 = 4/12

1/4= 3/12

1/2 = 6/12

4/12 + 3/12 + 6/12 = 13/12