We found the unit price, quantity and total price on two shopping receipts. The unit price of the yogurt bread I bought is 9.90 yuan, the quantity is 1.00, and the total price is 9.90 yuan, which is just in line with the formula we have learned. Unit price × quantity = total price. The price of bread keeps two decimal places. I can understand that the monetary unit is jiao yuan fen, the integer part only represents a few yuan, the decimal place represents a few cents, and the percentile represents a few cents.

But why should the quantity be written as 1.00 instead of directly written as 1? I don't quite understand. From the shopping receipt, I can also see that every product is listed in one line, and when the product name is different, a new line will be listed. But this arrangement is irregular, not according to the price level or the quantity of goods.

Because I see high-priced ones in front and high-priced ones behind. The price of cream cake is higher than that of yogurt bread, which is higher than that of puffs.

I also compared two shopping receipts with different dates, and found that the receipt with the newer date has a little more content than the previous receipt, not only the date, but also the specific time. There are also information about the recruitment hotline and the recruitment salesman, so that we can know the recruitment information and telephone number when we see the receipt, which makes life more convenient.

Benefits of learning math well:

1. Today, someone suddenly asked me what's the advantage of learning math well? It suddenly occurred to me to write an article about it and share it with you. I also hope that I can help those children who go to junior high school to learn math well and have the passion and perseverance to go to junior high school like me.

2. When I was in junior high school, I usually got full marks in mathematics, and I was also a teacher and friend with my classmates. I'm also a math class representative.

3. Only by preparing lessons carefully, studying hard, reviewing homework carefully, helping students solve problems and discussing with their classmates, I don't know how to ask the teacher. That's what I did at the beginning, so math is still quite good.