Question

5lA soma 0,57 + 0,227 resulta na fração,
a) b) c) a) 3
e)​

Answer 1

Resposta:

D

Explicação passo-a-passo:

57,777... = 100x

5,7777... = 10x -

52 = 90 x

x = 52/90 = 26/45

227,777... = 1000x

22,7777... = 100x -

205 = 900 x

x = 205/900 = 41/180

$0,5777... + 0,22777... = \\ </p><p> \frac{52}{90} + \frac{205}{900} = \\ \frac{520 + 205}{900} = \frac{725}{900} = \frac{29}{36}$