Question

Atividade 9º ano<br />a) 1/3 - 4/5 =<br />b) 2/3 – 7/3 =<br />c) 5/2 - 3/2 =<br />d) 9/5- 3/4 =<br />e) 3/5 - 9/5 =<br />f) 1/3-1/2=<br />g) 20/9– 30/5 =<br />h) 2/3 – 3/5 =<br />;) 11/5 – 3 /7=<br />j) 3/5 – 3/7 =<br /><br />​

Answer 1

Oi...

a)

1/3 - 4/5⇒mmc = 15

5 - 12/15

- 7/15

b)

2/3 – 7/3 ⇒mmc = 2

2 - 7/3

- 5/3

c)

5/2 - 3/2 ⇒mmc = 2

5 - 3/2

2/2

1

d)

9/5 - 3/4 ⇒ mmc = 20

36 -15/20

21/20

e)

3/5 - 9/5 ⇒mmc = 5

3 - 9/5

- 6/5

f)

1/3-1/2⇒mmc = 6

2 - 3/6

- 1/6

g)

20/9– 30/5⇒

20/9 - 6⇒mmc =9

20 - 54/9

- 34/9

h)

2/3 – 3/5 ⇒mmc = 15

10 - 9/15

1/15

i)

11/5 – 3 /7⇒mmc = 35

77 - 15/35

62/35

j)

3/5 – 3/7 ⇒mmc = 35

21 - 15/35

6/35

Espero ter ajudado.