Question

1. Efetue as operações entre os números racionais:
a) 1/9 + 4/9 =

b) 3/5 + 2/3 =

c) -4/7+2/7

d) 1/2-(1/4-1/8)

e) (1/2-1/4) -1/8

Answer 1

a) 1/9 + 4/9 = 5/3^2 = 0.55555.....

b) 3/5 + 2/3 = 19/15 = 1.26666.....

c) -4/7+2/7 = -2/7 = 0.28571.....

d) 1/2-(1/4-1/8) = 3/8 = 0.375

e) (1/2-1/4) -1/8 = 1/2^3 = 0.125