During the National Day holiday, my mother and I went shopping in the supermarket to find kilograms and grams. Walking into the supermarket, we first came to the biscuit cabinet. Among so many dazzling cookies, I chose my favorite casual cookie. I looked at it carefully and finally found the "net content100g" in the corner, indicating that the weight of this packet of biscuits excluding the bag is100g. If there is100g,

Then we went to the place where we bought rice. I found that a bag of rice costs 10 kg. If our family eats 2 kilograms a day, our family will eat 60 kilograms a month, which is six bags of rice.

Later, I saw 16 eggs, about 1 kg, a pineapple about 2 kg and a watermelon about 3 kg.

Today, I have gained a lot. I feel the knowledge of kilograms and grams in mathematics. Mathematics is really important in life.

This afternoon, my mother and I went shopping in the supermarket.

When we finished buying what we needed, we were about to leave. I saw sausages on the shelf, so I asked my mother to buy some sausages, and my mother agreed. But just after a few steps, I saw a package with the same brand and weight on the shelf, which contained 10 pieces at 4.30 yuan each. Do you want to buy a pack or a slice? I hesitated. Suddenly, my mind turned and I understood. Just compare and see which one is cost-effective. So I started to calculate: if I buy 10 pieces in retail, each piece costs 40 cents, which is equal to 4 yuan, and the whole package costs 4.30 yuan, which is 3 cents more, so I decided to buy it in bulk. I told my mother the process of my calculation, and my mother praised me for my love of brains.

Today, I read a book, The Story of Science, and I feel very heavy.

It tells the story of a mathematician. His family was poor, but he was eager to learn, so he was sent to school. But he's not serious. Keep playing. One day, the teacher talked to him: "The food you ate and the money you spent at school were all the fruits of your father's hard work. Who do you deserve if you don't study hard now? " He was inspired a lot. He thought: When I grow up, I want to be an astronomer and a writer.

But later, influenced by a teacher who came back from studying in Japan, he turned his interest to mathematics. Do you know who he is?

He is Sue, a famous mathematician in China.

Smoking is harmful to health. Dad smokes a newspaper every day, 20 cigarettes per pack. I learned that each cigarette can shorten people's life span by 3 minutes, so it will be shortened every day.

20X3=60 minutes = 1 hour life, which shortens life by 365 days per year X 1 hour =365 hours. So I said to my father, "Smoking is harmful to health."