Respostas

2014-04-22T21:19:46-03:00
6 ( centena = x100 )
11 ( dezena = 10 )
15 ( unidade = x1 )

a) 600 + 110 + 15 = 725

b) 1900 + 120 + 20 = 2040

c) 500 + 1230 + 15 = 1745
7 4 7
2014-04-22T21:44:20-03:00