Question

a) 2/9 + 5/9=

b) 5/6 - 2/6=

c) 3/4 + 1/5=

d) 7/8 - 4/9=

e) 1/7 + 3/5 + 9/14=

f) 3 - 14/5=​

Answer 1

Olá...

Resolução

a) 2/9 + 5/9 ⇒ mmc = 9

2 + 5/9

7/9

b) 5/6 - 2/6 ⇒ mmc = 6

5 - 2/6

3/6 ÷ 3

1/2

c) 3/4 + 1/5⇒mmc = 20

15 + 4/20

19/20

d) 7/8 - 4/9⇒mmc = 72

63 - 32/72

31/72

e) 1/7 + 3/5 + 9/14⇒mmc (7, 5, 14) = 70

10 + 42 + 45/70

97/70

f) 3 - 14/5 ⇒ mmc = 5

15 - 14/5

1/5

Bons estudos.