Question

me ajudem, por favor ​

Answer 1

a) 2 / 3 + 1 / 6 + 3 / 9

mmc(3,6,9) = 18

12 / 18 + 3 / 18 + 6 / 18 = 21 / 18

b) 2 / 5 + 3 / 5 + 4 / 5 + 1 / 5 = 10 / 5 = 2

c) 2 / 7 - 1 / 3

mmc(7,3) = 21

6 / 21 - 7 / 21 = - 1 / 21

d) 7 / 4 - 3 / 4 - 2 / 4 - 1 / 4 = 1 / 4