今天真是难为我了,因为爸爸给我出了一道趣味数学题。这道题生活气息很浓,算不对了也想算,实在吸引人。题是这样的:小李去王老板的店里买裤子,其中一种款式的裤子每条成本18元,标价21元。小李看中了一条裤子,掏了一张面额为100元的钞票给王老板。王老板没有零钱找给小李,就拿着这张100元大钞向赵老 Today is really difficult for me, because my father gave me a fun math problem. This topic is very rich flavor of life, not right and want to count, it is attractive. The question is this: Mike went to the king’s shop to buy pants, one of the pants of each style cost 18 yuan, price 21 yuan. Xiao Li fancy a pair of pants, dig a dollar denomination of 100 yuan to the boss. Wang boss no change to find Li, took this 100 yuan bills to Zhao old