Question

calcule:
a- 2/5 + 4/3 =
b- 3/2 + 7/3 + 5/2 =
c- 7/5 - 2/3 + 1/2 =
d- 3/2 * 4/6 =

Answer 1

Vamos lá...

a)

2/5 + 4/3  ⇒mmc = 15

6 + 20/15

26/15

b)

3/2 + 7/3 + 5/2  

3 +5/2 + 7/3

8/2 + 7/3

4 + 7/3⇒mmc =3

12 + 7/3

19/3

c) 7/5 - 2/3 + 1/2 ⇒ mmc = 30

42 - 20 + 15/30

57 - 20/30

37/30

d)

3/2 × 4/6

12/12

1

Bons estudos.

Answer 2

Calcule com o mmc

a) 2/5 + 4/3 = 6/15 + 20/15 = 26/15

b) 3/2 + 7/3 + 5/2 = 9/6 + 14/6 + 15/6 = 38/6 = 19/3

c) 7/5 - 2/3 + 1/2 = 42/30 - 20/30 + 15/30 = 37/30

d) (3/2)*(4/6) = 12/12 = 1