Efetue as adições: i)(-2/5) +3 j)(-1/6) + (+2) k)(-5/3) + (+1) L)(-2) + (-1/2) L)(+5/8) + (+1/2) + (-2/15) m)(+1/2) + (-1/3) + (+1/5) n)(-1/2) + (-4/10) + (+1/5) o)(-3/5) + (+2) + (-1/3)
Soluções para a tarefa
Resposta:
i)(-2/5) +3
- 2/5 + 3 = MMC(5, 1) = 5
- 2/5 + 15/5 =
11/5
j)(-1/6) + (+2)
- 1/6 + 2 = MMC(6, 1) = 6
- 1/6 + 12/6 =
11/6
k)(-5/3) + (+1)
- 5/3 + 1 = MMC(3, 1) = 3
- 5/3 + 3/3 =
- 2/3
L)(-2) + (-1/2)
-2 - 1/2 = MMC(1, 2) = 2
- 4/2 - 1/2 =
-3/2
L)(+5/8) + (+1/2) + (-2/15)
+ 5/8 + 1/2 - 2/15 = MMC(8, 2, 15) = 120
75/120 + 60/120 - 16/120 = 8, 2, 15 |2
119/120 4, 1, 15 |2
2, 1, 15 |2
1, 1, 15 |3
1, 1, 5 |5
1, 1, 1 |2 . 2 . 2 . 3 . 5 = 120
m)(+1/2) + (-1/3) + (+1/5)
1/2 - 1/3 + 1/5 = MMC(2, 3, 5) = 30
15/30 - 10/30 - 6/30 = 2, 3, 5 |2
15/30 - 16/30 = 1, 3, 5 |3
- 1/30 1, 1, 5 |5
1, 1, 1 |2 . 3 . 5 = 30
n)(-1/2) + (-4/10) + (+1/5)
- 1/2 - 4/10 + 1/5 = MMC(2, 10, 5) = 10
- 5/10 - 4/10 + 2/10 = 2, 10, 5 |2
-9/10 + 2/10 = 1, 5, 5 |5
- 7/10 1, 1, 1 |10
o)(-3/5) + (+2) + (-1/3)
- 3/5 + 2 - 1/3 = MMC(5, 1, 3) = 15
- 9/15 + 30/15 - 5/15 = 5, 1, 3 |3
- 14/15 + 30/15 = 5, 1, 1 |5
16/15 1, 1, 1 |3 . 5 = 15
Espero ter ajudado.
Explicação passo-a-passo: