Question

sabendo que x=3,444... e y=0,133... , calcule o valor de x+y

Answer 1

Vamos lá :

x = 3,444..
10x = 34,444 ...
___________+
10x - x = 34 - 3
9x = 31
x = 31 / 9

..................................

y = 0,1333 ...

10y = 1,333...
100y = 13,333 ...
_____________+
100y - 10y = 13 - 1
90y = 12
y = 12/90  ; 6
y = 2 / 15

....................................

x + y = ??

31 / 9 + 2 / 15

Mmc (15,9)

15 , 9 | 3
5   , 3 | 3
5   , 1 | 5
1   , 1                  ===> 3² * 5 = 45

31 * 5/ 45 + 2 * 3/ 45

= 155 + 6/45
= 161 /45

Espero ter ajudado !!!