cost 15 to make the shoes, gave the boy 29 for change, and need 29 more to pay back the nieghborhood, so 15+29+29= 73. simple ,math problem. much easier than calculus~7 Q; H: f O1 E! s4 w: q
tvb now,tvbnow,bttvb! R" _ I4 Q, B% W
[ 本帖最後由 carsonchan 於 2009-2-15 04:18 PM 編輯 ] |