Jawabanmu

2014-08-22T19:11:56+07:00
5 + 5 = 10
10 + 10 = 20 
15 + 15 = 30
2014-08-22T19:12:08+07:00
1. 5 + 5 = 10
2. 10 + 10 = 20
3.15 + 15 = 30