Question

Calcule o valor das expressões e apresente o resultado na forma de fração irredutível :


a)0,5+1/4×1/3

b)1/2+1/3÷1/6

c)1/4×0,5+1/2

d)15÷(3/4-1/4)

e) (3+1/2)×4/5

f) (0,75+1/4)÷2/5+1/2



PFV COLOQUE A CONTA...

Answer 1

a)0,5+1/4×1/3
0,5 + 1/12
1/2 + 1/12
MMC de 2 e 12 = 12
6/12 + 1/12
7/12

b)1/2+1/3÷1/6
1/2 + 1/3 * 6/1
1/2 + 6/3
1/2 + 2
MMC de 2 e 1 = 2
1/2 + 4/2
5/2

c)1/4×0,5+1/2
1/4 * 1/2 + 1/2
1/8 + 1/2
MMC de 8 e 2 = 8
1/8 + 4/8
5/8

d)15÷(3/4-1/4)
15 ÷ 2/4
15/1 * 4/2
60/2
30

e) (3+1/2)×4/5
MMC de 1 e 2 = 2
(6/2 + 1/2) × 4/5
7/2 × 4/5
28/10 (simplificar por 2)
14/5

f) (0,75+1/4)÷2/5+1/2
(3/4+1/4)÷2/5 + 1/2
4/4 ÷ 2/5 + 1/2
1 ÷ 2/5 + 1/2
1/1 * 5/2 + 1/2
5/2 + 1/2
6/2
3