3. Some as seguintes frações: a) 1/4 + 2/8 b) 3/5 + 1/10 c) 2/3 + 3/6 d) 5/6 + 1/6

Vamos somar as frações: a) 1/4 + 2/8 = 2/8 + 2/8 = 4/8 = 1/2 b) 3/5 + 1/10 = 6/10 + 1/10 = 7/10 c) 2/3 + 3/6 = 4/6 + 3/6 = 7/6 d) 5/6 + 1/6 = 6/6 = 1 Portanto, as respostas são: a) 1/2 b) 7/10 c) 7/6 d) 1