Question

Por favor,me ajudem.Não to conseguindo resolver essas frações!!
a)2/3+5/7=
b)3/4+1/2=
c)3/6+2/4=
d)3/5-2/3=
e)4/5+6/7=
f)35/48.8/7=
g)3/4+5/6.2/4=
h)2/4-5/7divido por 7/8=

Answer 1

a) 29/21
b) 5/4
c) 5/6
d) -1/10
e) 58/35
f) 280/336 ... simplificando ... 5/6
g) 28/24 ... simplificando ... 7/6
h) 35/40 ... simplificando ... 7/8

Answer 2

a) 14/21 + 15/21 = 29/21
b) 3/4 + 2/4 = 5/4
c) 1/2 + 1/2 = 1
d) 9/15 - 10/15 = -1/15
e) 28/35 + 30/35 = 58/35
(Se  f for 35 dividido por 48 vezes 8/7)
f) 35/48 * (8/7) = (35 * 8)/(48 * 7) = 280/336 = 140/168 = 70/84 = 35/42 = 5/6
g) 3/4 + 10/24 = 3/4 + 5/12 = 9/12 + 5/12 = 14/12 = 7/6
h) (2/4 / 5/7)/(7/8) = 2/4 / ( 5/7 * 7/8  ) = (2/4) / (35/56) = (2/4)/(5/8) = (2/4)*(8/5) = 16/20 = 8/10 = 4/5
Espero ter ajudado :D