Question

Efetue as operações com denominadores diferentes( 3/4 - 2/3 )
(7/9 - 1/3 ) (3/12 - 1/8 ) ( 3/8 - 2/7 ) (3/5 - 1/7)

Answer 1

Oi....

Efetue as operações com denominadores diferentes:

a)

( 3/4 - 2/3 )  ⇒mmc = 12

9 -8/12

1/12

b)

(7/9 - 1/3 ) ⇒ mmc = 9

7 - 3/9

4/9

c)

(3/12 - 1/8 )

1/4 - 1/8 ⇒ mmc = 8

2 - 1/8

1/8

d)

( 3/8 - 2/7 )⇒mmc = 56

21 - 16/56

5/56

e)

(3/5 - 1/7) ⇒ mmc = 35

21 - 5/35

16/35

Bons estudos.

Answer 2

3/4-2/3=1/12

7/9-1/3=4/9

3/12-1/8=1/8

3/8-2/7=5/56

3/5-1/7=16/35