Respostas
Resposta:
1.
a. 8 partes iguais
b. 1/8
c. 5/8
2. partes área pintada
a. 1/12 9/12
b. 1/6 5/6
c. 4/4 4/4
d. 1/5 3/5
3.
a. 3/4 + 7/4 + 1/4 =
3 + 7 + 1 / 4 =
11/4
b. 3/2 + 3/7 = mmc 14
14:2.3 + 14:7.2 / 14 =
21 + 4 / 14
25/14
c. 3/4 + 3 + 5/6 = mmc 12
12:4.3 + 12.3 + 12:6.5 / 12 =
9 + 4 + 10/12 =
23/12
d. 7/3 + 2/3 + 6/3 + 1/3 =
7 + 2 + 6 + 1 / 3 =
16/3
e. 7/2 + 1/4 + 6/3 + 1/3 = mmc = 12
12:2.7 + 12:4.1 + 12:3.6 + 12:3.1 / 12 =
42 + 3 + 24 + 4 / 12 =
73 / 12
f. 6/3 + 5/2 + 3/6 + 7 = mmc = 6
6:6.2 + 6:2.5 + 6:6.3 + 6.7 / 6
2 + 15 + 3 + 42 / 6
62 / 6 = simpl. por 2 =
31 / 3
g. 15/10 - 3/10 =
15 - 3 / 10 =
12 / 10 = simpl. por 2
6/5
h. 2/3 - 1/4 = mmc 12
12:3.2 - 12:4.1 / 12 =
8 - 3 / 12 =
5 / 12
i. 3/1 - 5/6 = mmc 6
6:1.3 - 6:6.5 / 6 =
18 - 5 / 6
13 / 6
j. 3/9 - 2/9 =
3 - 2 / 9 =
1/9
Explicação passo-a-passo: