Question

para cada numero decimal escreva uma  fração decimal e simplifique ate formá-la irredutível
a) 0,5
b) 2,56
c) 1,04
d) 0,75
e) 0,25
f) 4,2
g) 1,5

Answer 1

5/10 = 1/2
256/100 = 64/25
104/100 = 26/25
75/100 = 3/4
25/100 = 1/4
42/10 = 21/5
15/10 = 3/2

Answer 2

$a) \;0,5= \frac{5^{:5}}{10_{:5}} = \frac{1}{2} \\ \\ b) \;2,56= \frac{256^{:4}}{100_{:4}} = \frac{64}{25} \\ \\ c) \;1,04= \frac{104^{:4}}{100_{:4}} = \frac{26}{25} \\ \\ d) \;0,75= \frac{75^{:25}}{100_{:25}} = \frac{3}{4} \\ \\ e) \;0,25= \frac{25^{:25}}{100_{:25}} = \frac{1}{4} \\ \\ f)\; 4,2= \frac{42^{:2}}{10_{:2}} = \frac{21}{5} \\ \\ g) \;1,5= \frac{15^{:5}}{10_{:5}} = \frac{3}{2}$