Question

me ajudem em matemática pfvr

Answer 1

Resposta:

1e) 53/60; f) 85/42.

2) 2,425.

Explicação passo a passo:

1e) 7/3 - 5/4 - 1/5 =

MMC(3, 4 e 5) =60.

140/60 - 75/60 - 12/60 =

65/60 - 12/60 =

53/60.

f) 5/3 + 1/2 - 1/7 =

MMC(3, 2 e 7) = 42.

70/42 + 21/42 - 6/42 =

91/42 - 6/42 =

85/42.

2) 3/4 + 4/5 + 7/8 =

MMC(4, 5 e 8) = 40.

30/40 + 32/40 + 35/40 =

62/40 + 35/40 =

97/40 = 2,425.