Shopping-math diary

Today is New Year's Eve, and the weather is particularly sunny. My mother took me to the morning market in Baogong Lake to buy food. I jumped out of bed happily, dressed quickly and went to the food market with my mother. Wow! The vegetable market is really lively, full of people, selling and laughing. I think it may be because the Spring Festival is coming. I see round and red tomatoes like apples, thin and long bean sprouts, purple eggplant like a curved moon and a lovely boat, and many green vegetables, such as lettuce, green vegetables and Chinese cabbage.

Listen to my mother: "On the first day of New Year's Day, my uncle, uncle and aunt will come to my house to see my grandmother and spend the New Year with us." So my mother and I bought a lot of vegetables, such as: bought two Jin of tomatoes, two yuan per Jin; I bought three Jin of wax gourd, one yuan per Jin; Long beans bought three Jin, two yuan per Jin; I bought two Jin of soybean sprouts, one yuan per Jin. At this moment, my mother asked me a question. Xinxin, you can use your math knowledge to calculate how much it will cost to buy food today. I smiled and told my mother that a * * * costs fifteen dollars. The formula is as follows:

(2× 2)+(3×1)+(3× 2)+(2×1) =15 (yuan)

Fan Wen 2

Wonderful Mathematics (math diary, Grade 4)

In life, mathematics is everywhere. For example: buy food! Buy stationery! Measuring cloth, etc. , all need to use mathematics.

This semester, the teacher taught a new knowledge, that is, the multiplication and division of decimals. This knowledge helps me a lot!

Last night, my mother went to buy oranges together. A kilo of oranges 1.8 yuan. My mother bought 4.5 kg and should pay 8. 1 yuan. But the clerk was careless and didn't know how to calculate it, so it became 9 yuan money. Fortunately, this semester I used the knowledge of Protestantism, and after doing a calculation in my mind, I immediately corrected the salesman's mistake.

Not only did my aunt, the shop assistant, praise me for my cleverness and my ability to multiply and divide decimals in such a small city, but my mother also praised me for saving her 0.9 yuan on the way home, and the knowledge I learned can be applied in my life.

Yes! If you don't learn this math well, it's not only 0.9 yuan that will lose, but also hundreds, thousands or even hundreds of millions!