Respostas

2014-05-30T20:20:42-03:00
7×7+5+2+5+87-10
49 + 5 + 2 + 5 + 77
49 + 12 + 77
138
1 5 1
2014-05-30T21:08:25-03:00
7x7= 49
5+2+5= 12
87-10=77; logo
49+12+77=138
1 5 1