Question

Efetue:

a) 3/8+1/6

b)3/10-4/15

c)1/4-1/6

d)1/2+1/3+1/5

Answer 1

a) 3/8 +1/6=
9/24+ 4/24 =
13/24

b) 3/10 -4/15=
 9/30 - 8/30=
 1/30

c) 1/4 - 1/6=
3/12 - 2/12=
1/12

d) 1/2 + 1/3 + 1/5 =
 15/30+ 10/30 + 6/30 =
 31/30

Answer 2

Vamos lá.

a) 3/8+1/6 = vamos achar o mmc de 8 e 6

8,6|2

4,3|2

2,3|2

1,3|3           2x2x2x3 = 24

1,1

3/8 + 1/6 = 9/24 + 4/24 = 13/24   aqui somei.

b)3/10-4/15

mmc de 10 e 15

10,15|2

5, 15|5      2x5x3 = 30

1, 3  |3 
1 , 1

3/10 - 4/15 = 9/30 - 8/30 = 1/30

c)1/4-1/6

mmc de 4 e 6

4,6|2

2,3|2      2x2x3 = 12

1,3|3

1,1

1/4 - 1/6 = 3/12 - 2/12 = 1/12

d)1/2+1/3+1/5

mmc de 2,3,5

2,3,5|2

1,3,5|3      2x3x5 = 30

1,1,5|5

1,1,1

1/2 + 1/3+1/5 = 15/30+10/30+6/30 = 31/30

espero ter ajudado.