Question

efetue o,333... e -1,999...

Answer 1

Bom dia

x = 0.333...

10x = 3.333...
10x - x = 3.333 - 0'.333
9x = 3
x = 3/9 = 1/3

y = -1.999..
y = -1 -0.999
x = 0.999
10x = 9.999
9x =  9
x = 1

y = -1 - 1 = -2