Question

Efetue a soma das frações:
a) 3/2+4/3
b) 3/4+1/3+5/6
c) 5/8+3/8-4/8
d) 1/2+3-4/8
e 3/7+2/7
f) 7/3+25/7
g) 17/5-1/3

Answer 1

Efetue a soma das frações:

a) 3/2+4/3

= (3.3+2.4)/6

= (9+8)/6

= 17/6

b) 3/4+1/3+5/6

= (3.3+4.1+2.5)/12

= (9+4+10)/12

= 23/12

c) = 5/8+3/8-4/8

= 8/8 - 4/8

= 4/8 (:4)/(:4)

= 1/2

d) = 1/2+3 - 4/8 (:4)/(:4)

= 1/2 + 3 - 1/2

= 3

e) = 3/7+2/7

= 5/7

____________

f) = 7/3+25/7

= (7.7 + 3.25)/21

= (49+75)/21

= 124/21

____________

g) = 17/5 - 1/3

Mmc (5,3)= 15

= (3.17 - 5.1)/15

= (51-5)/15

= 46/15

Answer 2

Resposta:

a) 17/6; b) 23/12; c) 1/2; d) 3; e) 5/7; f) 124/21; g) 46/15.

Explicação passo a passo:

a) 3/2 + 4/3 =

Igualando os denominadores:

9/6 + 8/6 =

17/6.

b) 3/4 + 1/3 + 5/6 =

Igualando os denominadores:

9/12 + 4/12 + 10/12 =

13/12 + 10/12 =

23/12.

c) 5/8 + 3/8 - 4/8 =

8/8 - 4/8 =

4/8 = 1/2.

d) 1/2 + 3 - 4/8 =

Igualando os denominadores:

4/8 + 24/8 - 4/8 =

28/8 - 4/8 =

24/8 = 3.

e) 3/7 + 2/7 =

5/7.

f) 7/3 + 25/7 =

Igualando os denominadores:

49/21 + 75/21 =

124/21.

g) 17/5 - 1/3 =

Igualando os denominadores:

51/15 - 5/15 =

46/15.