Question

Calcule e expresse o resultado na forma de fração irredutivel.A)1-0,5+0,222... B)0,444...+0,4-1/2​

Answer 1

Resposta:

A)

1-0,5+0,222...=

1-1/2+2/9=18/18-9/18+4/18

=(18-9+4)/18=13/18

B)

0,444...+0,4-1/2=4/9+4/10-1/2

=4/9+2/5-1/2=20/45+18/45-1/2

=38/45 -1/2  

=(38*2-45*1)/(45*2)

=31/90

Answer 2

Resposta:

a) 1 - 1/2 + 2/9 = 18/18 - 9/18 + 4/18 = 13/18

b) 4/9 + 4/10 - 1/2 = 40/90 + 36/90 - 45/90 = 31/90