Question

como resolver a conta 1/4 - 1/3

Answer 1

basta fazer mmc de 4 e 3 = 12.
12 vira o denominador

logo, 1/4-1/3= 3/12-4/12 = -1/12

Answer 2

$\dfrac{1}{4} - \dfrac{1}{3}= \\ \\ \\ \dfrac{1*3}{4*3} - \dfrac{1*4}{3*4}= \\ \\ \\ \dfrac{3}{12} - \dfrac{4}{12}=\dfrac{3-4}{12}= \boxed{ - \dfrac{1}{12} }$