Today, "children" have the final say. I took the money my father gave me to buy food.
I came to the vegetable market and wanted to buy food. The food in the market 1.5 yuan, ready to buy 2 kg. But I looked at the food outside the market, which is 1.2 yuan, which is more delicious than the food inside. I was going to buy another catty and fry it at night, which not only bought more vegetables, but also became cheaper and cheaper.
Then, I go to buy meat. The meat on the market is lean meat, 4.5 yuan is a catty; As for the meat outside the market, the lean meat is one kilo less than that of 4.5 yuan. In contrast, I certainly choose the meat in the market. So I bought 3 Jin of meat and spent 4.5×3= 13.5 yuan.
? Then, I go to buy chicken legs. I saw that the chicken legs in the market are bony and have the harm of flies. 6 yuan a catty, I looked at the chicken legs outside the market. I see flesh and bones, delicious, pollution-free, but a little expensive, 8 yuan a catty. However, for the sake of health, be more expensive! And it's only 8-6=2 yuan, so I bought a kilo.
With the delicacy of crucian carp, I came to a crucian carp stall. The crucian carp here is fresh, tender and alive. It's a first-class crucian carp, but the crucian carp in other stalls are not so good. But the crucian carp here is too expensive, 10 yuan a kilo. So I bargained with the stall owner's aunt. I said, "Aunt, the crucian carp here is very good, but it is too expensive. You see, the first time I went out to buy food, it was cheap! " Aunt said, "you know this fish is delicious, little friend." To 10 yuan is already very cheap. " I talked with my aunt for a long time. My aunt agreed, but it was only one yuan cheaper. I looked at the money in my pocket, only 4.9 yuan was left. So I bought half a catty and spent (10- 1)÷2=4.5 yuan money.
On the way home, I counted the dishes and figured out that I used 3.6+ 13.5+8+4.5=29.6 (yuan) for a * *, plus 29.6+(4.9-4.5)=29.6+0.4=30 (yuan) for the rest. On the 30 yuan money my father gave me.
I was deeply impressed by buying vegetables this time.
Buy medicine
After school on Tuesday afternoon, my father and I went to Longhua's drugstore and bought two boxes of "watermelon frost" pills, one ***66 yuan. Father paid the clerk 100 yuan, and the clerk gave it to his father 34 yuan. After looking for the change, I calculated that my dad could still pay: 1, to 70 yuan, the shop assistant, for 4 yuan. 2. Direct payment to 66 yuan.
By buying medicine with my father this time, I know that mathematics is closely related to our lives.
There is a joke today.
I played a little joke today because I was careless.
My dad asked me to go to the garage to see what happened to the price of each car. I saw a car drop from 450 thousand to 350 thousand. I wrote in my notebook that the car "XXX" dropped from 45 yuan to 35 yuan. I showed it to my dad, and he smiled from ear to ear. I thought he was happy because the car was reduced in price! I went over and asked, "What's the matter?" Dad said to buy a car at once. I asked, "Did you get the money?" I can afford it without taking it. Dad showed me the notebook, and I laughed loudly and said, "In that case, you can buy more cars."
Find the greatest common divisor
Today, we learned to find the greatest common divisor. Although I understood what the teacher said at first, I always felt that learning other new lessons in An 'an was different: I always felt that I would do it as soon as I understood it, and my thinking was clear and relaxed. But what the teacher said this time, I really understand, that is, the thinking is very vague and complicated. I think: since it is complicated, it is better to find a topic to try. So, I use 18 and 30 in the textbook to do the problem. I have to count it. It's 6 o'clock. Compared with the one in the book, I got it right. Suddenly, I feel that the vague idea just now is much clearer, and I finally understand it.
Mathematics is really wonderful.
Today, Teacher Yuan talks about how to find the least common multiple. The teacher said, "If two books are prime numbers, their product is their least common multiple." I think: the number smaller than their product may also be their common multiple!
After class, I calculated several pairs of prime numbers with my exercise book, but their least common multiple is equal to their product. It's amazing! The truth of mathematics is amazing! I will study hard and master more skills.