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.

2.& lt a little math misunderstanding >

Many people think that Arabic numerals were invented by Arabs, but I have always been skeptical about him. As I expected, today the math teacher introduced the real origin of Arabic numerals. It turned out to be a misunderstanding! The real inventors of Arabic numerals were Indians, because the navigation industry of Arabs was very developed at that time, and they spread the numerals from India to Arabia. Europeans learned this simple counting method from books and thought it was invented by them, so they called it Arabic numerals. Later, this misunderstanding spread to China.

Finally, I really want to say to Indians, "Thank you for bringing us so much convenience. Because of this, I like math very much. Not only the digital kingdom is magical, but also the knowledge of mathematical history is very rich.

5. < Discovery > 3 (4) He Chao

Today, I found a math problem at home.

I found that a cup of cola is 800g, a cup of green tea is 500g, and a cup of iced black tea is unknown, so I added a message-iced black tea is 200g less than cola, so how many grams do you need for three cups? So, I calculated according to the teacher's method: 800-200=600, then 600+500= 1 100, and finally1100+800 =1900, so

I think there are many math problems in daily life. I hope that children can observe more math problems around them.

6. < clever addition and subtraction >:

Addition and subtraction are indispensable in our life. There are many things around us that need to be added and subtracted. For example, at school, we count scores and numbers-in life, my mother goes shopping to pay for meals; The family also uses addition and subtraction to calculate the monthly expenses. All this is related to addition and subtraction, so addition and subtraction play a very important role in our life.

Addition and subtraction are wonderful!