Jawabanmu

2014-07-28T18:28:03+07:00
2.
a) 24 + 29 + 34 + 39 + 44 + 49 + 54 + 59 + 64 + 69 + 74 + 79 + 84 + 89 + 94 + 99
b) 48 + 42 + 36 + 30 + 24 + 18
2014-07-28T20:04:35+07:00