Question

Calcule valor da soma 0,777...+0,2333​

Answer 1

Resposta:

a=0,7777...

10a=7,777..

10a-a=7,777..-0,777..

9a=7

a=7/9

b=0,23333...

10b=2,333...

100b=23,333...

100b-10b=23-2

b=21/90

0,7777...+0,233333...=7/9+21/90 =70/90+21/90=91/90