Question

Qual o valor da expressão?
2/5 + 1/15 - 2/3

a) 1/5
b) -1/5
c) 3/15
d) 5

Answer 1

Explicação passo-a-passo:

$\sf \dfrac{2}{5}+\dfrac{1}{15}-\dfrac{2}{3}$

$\sf mmc(3,5,15)=15$

$\sf =\dfrac{3\cdot2+1\cdot1-2\cdot2}{15}$

$\sf =\dfrac{6+1-4}{15}$

$\sf =\dfrac{3}{15}$

$\sf =\dfrac{1}{5}$