Question

calcule os valor das expressões numéricas
a) ½ + ⅓ + ⅚
b) ¾ + ⅚ - ½
c) ⅚ - ½ - ⅓
d) ½ - ⅓ + ⅚ - ¾​

Answer 1

Resposta:

$\text{Leia abaixo}$

Explicação passo-a-passo:

$a)\: \dfrac{1}{2} + \dfrac{1}{3} + \dfrac{5}{6} = \dfrac{3 + 2 + 5}{6} = \dfrac{10}{6} = \dfrac{5}{3}$

$b)\: \dfrac{3}{4} + \dfrac{5}{6} - \dfrac{1}{2} = \dfrac{9 + 10 - 6}{12} = \dfrac{13}{12}$

$c)\: \dfrac{5}{6} - \dfrac{1}{2} - \dfrac{1}{3} = \dfrac{5 - 3 - 2}{6} = \dfrac{0}{6} = 0$

$d)\: \dfrac{1}{2} - \dfrac{1}{3} + \dfrac{5}{6} - \dfrac{3}{4} = \dfrac{6 - 4 + 10 - 9}{12} = \dfrac{3}{12} = \dfrac{1}{4}$