Question

efetue
a) 2/3+4/5=
b)6/7+4/4=
c)3/4-2/3=
d)5/7-2/5
e)2/6×3/4=
f)3/7÷2/9=
h)4/6÷5/8=​

Answer 1

Olá...

Resolução:

a)

2/3 + 4/5 =mmc (3,5) = 15

10 + 12/15

22/15

b)

6/7 + 4/4

6/7 + 1 = mmc  (7, 1) = 7

6 + 7/7

13/7

c)

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

9 - 8/12

1/12

d)

5/7 - 2/5 = mmc  (7, 5) = 35

25 - 14/35

11/35

e)

2/6 × 3/4

1/3  × 3/4

3/12 ÷ 3

1/4

f)

3/7 ÷ 2/9

3/7 × 9/2

27/14

h)

4/6 ÷ 5/8​

2/3 × 8/5

16/15

Bons estudos.

Answer 2

resolução!

A )

= 2/3 + 4/5 _______ MMC = 15

= 10 + 12/15

= 22/15

B )

= 6/7 + 4/4 ________ MMC = 28

= 24 + 28/28

= 52/28 ÷ 4

= 13/7

C )

= 3/4 - 2/3 ______ MMC = 12

= 9 - 8/12

= 1/12

D )

= 5/7 - 2/5 _________ MMC = 35

= 25 - 14/35

= 11/35

E )

= 2/6 x 3/4

= 6/24 ÷ 6

= 1/4

F )

= 3/7 ÷ 2/9

= 3/7 x 9/2

= 27/14

H )

= 4/6 ÷ 5/8

= 4/6 x 8/5

= 32/30 ÷ 2

= 16/15