Question

Se × é = 3,888 .. e y e igual a 1\3 calcule o valor de x-y

Answer 1

x = 3,888 . . .
y = 1/3

Solução 1:
x = 3,888 . . .
y = 1/3 = 0,333 . . .

x - y =
3,888 . . . - 0,333 . . . = 3,555 . . .  =
3,555 . . . = 3 5/9 = (9x3 + 5)/9 = 32/9
x - y = 3,555 . . . = 32/9

Solução 2:
x = 3,888. . .= 3 8/9 = (9x3+8)/9 = 35/9
y = 1/3

x - y =
35/9 - 1/3 = 

mmc (3,9) = 9

35/9 - 1/3 = 35/9 - 3/9 = 32/9
x - y = 32/9 (= 3,555 . . .)