Question

calcule o valor das expressoes a)(2-1/3)÷(1+1/9) b)(1/4+1/6)×(1/4-1/6)

Answer 1

a)
(2 - 1/3) ÷ (1 + 1/9) =
((6 - 1) / 3) ÷ ((9 + 1) / 9) =
5/3 ÷ 10/9 =
5/3 * 9/10 =
45 / 30 =
3/2

b)
(1/4 + 1/6) * (1/4 - 1/6) =
((3 + 2) / 12) * ((3 - 2) / 12) =
5/12 * 1/12 =
5 / 144