Question

assunto: somar,subitrair, dividir e multiplicar frações porfavor coloquem calculos para melhor resposta
a)2/5 + 1/3
b) 7/9 - 1/6
c)5/8 + 7/12
d)1/2- (1/4 - 1/8)
e)3/8 * 5/2 * 2/7
f)4/9 * 3/2* 3/7
g)5/4: 3/2
h)4/6 : 1/3

Answer 1

a) 2/5 + 1/3 =    3*2 + 5*1/15 = 6 + 5 /15 = 11/15

b) 7/9 - 1/6 =   2*7 - 3*1 /18 = 14 - 3 / 18 = 11/18

c) 5/8 + 7/12 = 3*5 + 2*7/24 = 15 + 14 /24 = 29/24

d) 1/2 - 1/4 + 1/8 = 4*1 - 2*1 + 1*1/8 = 3/8

e) 3/8 * 5/2 * 2/7 = 30/112 = 15/56 

f) 4/9 * 3/2 * 3/7 = 36/126 = 18/63

g) 5/4 : 3/2 = 5/4 * 2/3 = 5/6

h) 4/6 : 1/3 = 4/6 * 3/1 = 4/2 = 2

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17/02/2016 
Sepauto - SSRC
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