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)418+812=

h)4/9+8/10=

Answer 1

Explicação passo-a-passo:

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

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

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

H)

4/9 - 8/10

40/90 72/90

40 - 72/90

-32/90

-16/45

R) -16/45

Espero ter ajudado! :)