Question

Fração

B) 7/6-3/8
C) 9/3+6/5
D) 7/4-2/5
E) 15/9-2/3

Answer 1

Resposta:

Explicação passo-a-passo:

B) 7/6-3/8

= 7/6 - 3/8

= (4.7 - 3.3)/24

= (28 - 9)/24

= 19/24

6,8: 2

3,4: 2

3,2: 2

3,1: 3

1,1 = 2.2.2.3 = 8.3 = 24

C) 9/3+6/5

= 9/3 + 6/5

= 3 + 6/5

MMC = 5

= (5.3 + 6)/5

= (15+6)/5

= 21/5

D)

= 7/4 - 2/5

MMC (4,5)= 20

4,5: 2

2,5: 2

1,5: 5

1,1 = 2.2.5 = 4.5 = 20

= (5.7 - 4.2)/20

= (35 - 8)/20

= 27/20

E)

MMC (9,3) = 3

9,3: 3

3,1: 3

1,1 = 3.3 = 9

= 15/9 - 2/3

= (1.15 - 3.2)/9

= (15 - 6)/9

= 9/9

= 1