Question

RESOLVA (a) 1/5 +2/7 (b) 4/3 -3/10 (c) 1/10+ 4/5 -3/15 (d) 5/9+4/3 - 3/5

Answer 1

Explicação passo-a-passo:

a) 1/5 + 2/7 = mmc 5, 7 I 5

7/35 + 10/35 = 17/35 1, 7 l 7

1, 1 35

b) 4/3 - 3/10 =

40/30 - 9/30 = 31/30 mmc 3, 10 I 2

3, 5 I 3

1, 5 I 5

1, 1 30

c) 1/10 + 4/5 - 3/15 =

3/30 + 24/30 - 6/30 = 21/30 (: 3) = 7/10

mmc 10, 5, 15 I 2

5, 5, 15 I 3

5, 5, 5 I 5

1, 1, 1 30

d) 6/9 + 4/3 - 3/5 =

30/45 + 60/45 - 27/45 = 63/45 (:9) = 7/5

mmc 9, 3, 5 I 3

3, 1, 5 I 3

1, 1, 5 I 5

1, 1, 1 45