Question

3- Efetue as operações:

A) 1/2+1/5=
B) 2/6+1/2+3/4=
C) 1/3+4/5+2/6=
D) 3/8+4/3-2/5=
E) 5/3-1/2=
F) 5/2-2/1+4/5=

Answer 1

Olá....

Resolução

a)

1/2 + 1/5 ⇒mmc de 2, 5 = 10

5 + 2/10

7/10

b)

2/6 + 1/2 + 3/4

1/3 + 1/2 + 3/4⇒mmc de 3, 2, 4 = 12

4 + 6 + 9/12

19/12

c)

1/3 + 4/5 + 2/6

1/3 + 4/5 + 1/3

1 + 1/3 + 4/5

2/3 + 4/5⇒mmc de 3, 5 = 15

10 + 12/15

22/15

d)

3/8 + 4/3 - 2/5 ⇒mmc de 8, 3, 5 = 120

45 + 160 - 48/120

205 - 48/120

157/120

e)

5/3 - 1/2⇒mmc de 3, 2 = 6

10 - 3/6

7/6

f)

5/2 - 2/1 + 4/5

5/2 - 2 +4/5⇒mmc de 2, 1, 5 = 10

25 - 20 + 8/10

33 - 20/10

13/10

Bons estudos.