Once upon a time, there was a poor scholar who was humorous and playful. Once I went to a noodle restaurant to buy noodles, and the price of noodles was 20 yuan a catty. After a little thinking, he threw a handful of copper coins in his hand to the shopkeeper. The shopkeeper asked how much it cost to buy noodles, and the scholar said, seven fives, eight fives, and four fives will add five if they are not enough. Don't be careless when you understand it, so as not to be confused. ? How many times do you want to see me? I don't want the shopkeeper to be a delicate and funny advocate. After blinking a few times, he weighed his face five times. The scholar asked, how many noodles did you give me? The shopkeeper said:? One and a half kilos, two and a half kilos, two and a half kilos, seven and a half kilos. Don't keep me from selling noodles. ? It took the onlookers a long time to know that the scholar took out 100 yuan and the shopkeeper weighed him five Jin of noodles.

? The first 36, the last 36. 36 urgent, through to * * * one hundred and eighty tones. ? This is a Hangzhou Bell Song in the past, and it is also an addition problem. Add three 36, and the answer 108 has been given. Taizhou also has a "Taizhou Bell Song": hit seven before, eight after, and serve slowly in the middle. Three recent strikes, three links 180. ? The first bell is 7+8+ 18+3=36, and the third bell is 36? 3= 108。 This is a mixed operation problem of addition and multiplication.

Lun, the number one scholar in Hongzhi period of Ming Dynasty, once wrote a poem for Su Shi's "Birds Returning to the Nest":? Born one after another, three four five six seven eight. Phoenix has so many birds that it pecks at thousands of stones in the world. ? Poetry exposes the exploitation of the people by corrupt officials, and it is also a math problem: 1+ 1+3? 4+5? 6+7? 8= 100 (only), just in line with the number of "birds returning to their nests".

There is a poem in Xu Ziyun's Algorithm Dacheng in Qing Dynasty:? The magnificent ancient temple is in the mountains. I wonder how many monks there are. 364 bowls, see if they are used up. Three people eat a bowl of rice and four people eat a bowl of soup. Excuse me, Mr. Ming, how many monks are there in the temple? This is an algebra problem. According to the meaning of the question, let the bowl for eating be X and the bowl for drinking soup be Y, and the equation is: X+Y = 364; 3x=4y, solving the equation gives x=208, y= 156, and there are 208 monks in the temple. 3=624 (person) or 156? 4=624 (person)

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