Question

Efetue as seguintes operações com frações.

a)

5 7

3 3



b)

5 1

9 6



c)

2 1

5 5



d)

1 2

4 3



e)

1 2

7 5



f)

2 3

5 4​

Answer 1

A) 1/7 + 7/3 mmc (7,3) = 21

3/21 + 49/21 = 52/21

B) 3/4 - 2/3 = mmc (4,3) = 12

9/12 - 8/12 = 1/12

C) 14/8 + 3/9 mmc(8,9)= 72

126/72 + 24/72 =150/72

D) 5/3 x 9/25 = 45/75

E) 2/9 + 4/7 - 3/4 mmc(9,7,4)= 252

56/252 + 144/252 - 189/252 = 11/252

F) 20/10 + 34/2 MMC (10,2)= 20

40/20 + 340/20= 380/20