Question

Calcule o mmc
A) 18, 5
B) 14, 7
C) 10, 20
D) 55, 11
Calcule as frações
A) 5/7+2/3
B) 6/5-3/2
C) 4/3×6/5
D) 2/7÷8/5
Me ajuda por favor

Answer 1

a)90

b)98

c)20

d)55

a)29/21

b)-3/10

c)24/15

d)5/28

Answer 2

a) 90

b) 14

c) 20

d) 55

a) 5/7 + 2/3

=> 15/21 + 14/21

=> 29/21

b) 6/5 - 3/2

=> 12/10 - 15/10

=> -3/10

c) 4/3 . 6/5

=> 24/15

=> 8/5

d) (2/7) / (8/5)

=> 2/7 . 5/8

=> 10/56

=> 5/28