Question

3. calcule e simplifiue quando for possivel

a) 2/6 + 3/6 =

b) 5/6 - 2/6 =

c) 3/4 + 5/4 - 1/4 =

d) 9/7 - 3/7 + 1/7 =

me ajudem porfavor

Answer 1

Com denominador igual, basta somar/subtrair:
a) 2/6 + 3/6 = 5/6
b) 5/6 - 2/6 = 3/6 = 1/3
c) 3/4 + 5/4 - 1/4 = 7/4
d) 9/7 - 3/7 + 1/7 = 5/7

Penso que seja isto.