For example, mom goes to buy fruits and vegetables, goes to the publishing house to reply to the manuscript ... and so on, all of which need math. There are many interesting mathematics in life, waiting for us to discover and explore.
During the summer vacation, my parents and I went to my cousin's house to play. I was thirsty on the road, so my father had to buy mineral water from the nearby grocery store. There is a rule in the grocery store: if you buy three bottles of mineral water, you can get a bottle of mineral water, and the price of a bottle of mineral water is 1 yuan. When my father saw it, he took out 10 yuan and gave it to the grocery store owner, saying, "The boss bought 10 bottle of water." When I got the water, I drank it hungrily, and soon I drank two bottles. Before I came to my senses, there were several empty bottles. Dad asked me, "Lingling,1how many bottles of mineral water can 0 yuan exchange?" I think: I drank 10 bottle of water, 9 empty bottles were replaced with 3 bottles of mineral water, 3 empty bottles were replaced with 1 bottle of mineral water ... and there were two empty bottles left. I happily said to my father, "Dad, I have worked it out. Yes 14 bottle of mineral water, and there are 2 empty bottles left. " Dad smiled and said, "Think again!" I said thoughtfully, "We can borrow another empty bottle from the grocery store owner and return it to the boss after drinking it. Oh! We can drink 15 bottles of mineral water. " Dad nodded in praise.
Mathematics is to use it flexibly and integrate theory with practice. Only by mastering the knowledge of mathematics can mathematics serve us better. So we should learn mathematics well and make mathematics a good helper in our study and life.
2.
Do you know what 10 minus 1 is? 9。 Yes, but not exactly.
If there are 10 birds in the tree, and 1 bird is knocked down by qiāng, 10 minus 1 here is not necessarily 9, but there may be no birds.
If there are 10 goldfish in the fish tank, one is dead and there are several left, then 10 minus 1 is still equal to 100.
If 10 candles were lit at night, and 1 was blown out by the wind, when asked if there were any candles at dawn, the answer was 1, because all the other candles were burnt out.
If it is 10 corner of the table, and 1 corner is cut off, then 10 minus 1 is still not equal to 9 because we will see 1 1 corner.
Well, if you still ask 10 minus 1, will you only think of 9? Do you have any other answers?
Yes, the wisdom of life is different from simple mathematical logic. The phenomenon of "10 minus 1" tells us that if you want to go to Rome, you can find many ways, just turn around or change the angle.
To have the wisdom of "10 minus 1", we need to have a broad vision and observe things from multiple angles. Materialist dialectics tells us that things are divided into two parts, and we can't see only one side of things, but also the other side, even many sides. Just like a seemingly simple math problem, if you are confined to the field of pure mathematics, you can only get one answer, but if you jump out of this circle and give "10" different specific things, then the answer will be rich. If we are interested in exploring, we will find that if the apple is cut differently, there will be a five-pointed star inside; If we have enough humor, we can also use the word "childish" to make such a lovely sentence as "it's really hot today".
To have the wisdom of "10 minus 1", you need the courage to break the conventional reverse thinking. Just like the previous math problem, if the math teacher says "10 minus 1 equal to 9", we think that "10 minus 1" must be equal to 9, so we lose the fun of understanding so many answers later. Modern scientists have broken the phlogiston theory and put chemical research on the right track. It was Beethoven who dared to subvert the traditional musical style and created many masterpieces handed down from generation to generation. There was once a story that the electric fan used to be black. It is precisely because a Japanese company dared to think reversely that it produced many color electric fans, which not only increased the sales volume, but also added color to the lives of future generations. It is also a little girl in Japan, who regards the unused long refill as used up, thus solving the problem of oil leakage of the long refill.
10 minus 1 equals 90.
10 minus 1 is not equal to 90.
10 minus 1 equals ...