Question

Escreva a representação fracionária de cada um os números racionais a seguir:

A) 2,8
B) 0,45
C) 52,4
D) -3,08
E) -1,022
F) 512,4

Answer 1

A)28/10
B)45/100
C)524/10
D)-308/100
E)-1022/1000
F)5124/10

Answer 2

A) 2,8 = 14/5
B) 0,45 = 9/20
C) 52,4 = 262/5
D) -3,08 = -77/20
E) -1,022 = -511/500
F) 512,4 = 2562/5

$A) 2,8=\frac{28}{10}= \frac{28}{10} :\frac{2}{2} = \frac{14}{5} \\\\ B) 0,45= \frac{45}{100}= \frac{45}{100}: \frac{5}{5}= \frac{9}{20}\\\\ C)52,4= \frac{524}{10}=\frac{524}{10}: \frac{2}{2} = \frac{262}{5} \\\\ D) -3,08 = \frac{-308}{100}= \frac{-308}{100}: \frac{4}{4} = \frac{-77}{20}\\\\ E) -1,022= \frac{-1022}{1000}= \frac{-1022}{1000}: \frac{2}{2} = \frac{-511}{500} \\\\ F) 512,4= \frac{5124}{10}=\frac{5124}{10}: \frac{2}{2}= \frac{2562}{5}$