Question

Calcule as frações abaixo : a)2/3+3/15= b)8/12+3/5= c)3/4 - 1/3= d)7/16+4/2= e)3/5+4/7= f)8/10+3/4= g)4/18=8/12= h)4/9- 8/10=

Answer 1

__________

A)

2/3 + 3/15 →

10/15 + 3/15

10 + 3 / 15

13/15

R) 13/15

_

B)

8/12 + 3/5

40/60 + 36/60

40 + 36 / 60

76/60

38/30

19/15

R) 19/15

_

C)

3/4 - 1/3

9/12 - 4/12

9 - 4 / 12

5/12

R) 5/12

_

D)

7/16 + 4/2

7/16 + 32/16

7 + 32 / 16

39/16

R) 39/16

_

E)

3/5 + 4/7

21/35 + 20/35

21 + 20 / 35

41/35

R) 41/35

_

F)

8/10 + 3/4

16/20 + 15/20

16 + 15 / 20

31/20

R) 31/20

_

G)

4/18 = 8/12

2/9 = 4/6

2/9 = 2/3

Falso

_

H)

4/9 - 8/10

40/90 - 72/90

40 - 72 / 90

-32/90

-16/45

R) -16/45

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Att: MarcosPCV