Interesting math story in the first grade of primary school

1. Mathematics created by the little squirrel: Spring has come, and the young trees have sprouted, so green and lovely. This is planted by squirrels in autumn. They planted five rows with three trees in each row. One day, mother squirrel said, "children, have all the saplings we planted grown up?"

The little squirrel skipped and said, "Yes, Mom, all grown up!" " "However, the number of squirrels cannot be counted. But I used two methods to calculate: one is addition: 3+3+3 = 15 (tree), and the other is multiplication, which also calculates15, that is, 3× 5 = 15 (tree).

2. Mathematics in the swimming pool: On Sunday morning, my parents and I went swimming in the mineral spring swimming pool. I went to the doll pool first to see how deep the water was. I saw many children younger than me swimming in the swimming pool. I counted only 50. I think: I should go swimming in the intermediate swimming pool. So I walked into the intermediate swimming pool.

There are many children swimming there, too, and several of my classmates are swimming there. I ran fast and joined their team. Our pool has more people 10 than the doll pool, and there are more people swimming in the senior pool next door, and there are also 20 more people than the doll pool.

Be a smart consumer: My parents and I plan to go to Hong Kong. We made a survey first to see what was the most cost-effective. Finally, we decided on the following plan: take a bus to Hong Kong at Dongfang Hotel, the fare is 100 Hong Kong dollars, and three people 100× 3 = 300. On the way, get off at Prince Edward Road Station and rent a double room from Prince Edward Road to Hailong Hotel, Ladies Street, Mong Kok. 220 yuan every night.

Book Disney Park tickets in Guang Zhi Travel Agency, including one adult ticket for 350 yuan and one child ticket for 2 10. It is estimated that there will be 9 meals in three days, and each person will have a fast food in 27 yuan, with 27× 9 = 243 yuan, and the total amount of three people will be 234× 3 = 702 yuan. Estimated fare for three days, 3 people * * per day 100 yuan, and 3 days ***300 yuan fare. The return train is also 100× 3 = 300 yuan (per person 100 yuan, ***3 people).

Then, our total consumption is: 300+220+350+210+720+300 = 2400 yuan, and the average daily consumption is: 2400 ÷ 3 = 800 yuan.

4. Dedicate love: You see, what a lovely little girl this is, but her parents both let the fierce tsunami take their lives. Holding the little girl is Aunt Liu of China International Health and Medical Rescue Team. Students, do you know? I read in Yangcheng Evening News that the total amount of private donations in China is10496438+0658 million yuan.

Students, let's all give a love and take out all our profits and money to help the people affected by the disaster. If each of us can take out 50 yuan money from the profits, then our sophomore 157 students can donate 7,850 yuan. I think so: If everyone donates to 50 yuan, 157 people will be 157 50. Through multiplication, we can quickly calculate how much money * * * donated, that is, 157×50 = 7850 (yuan).

Students, act quickly!

5. Decimal point in the Olympic Games: The 2004 Athens Olympic Games has been the 28th, and this year's Olympic Games started in August 13. In this Olympic Games, Hu Jia's brother participated in the men's 10 meter platform race. His final jump score was 100.98, while that of the French athlete was 99.85. After comprehensive statistics, Brother Hu Jia finally won the championship.

Won the gold medal of 3 1 for our country. Students, how big is the gap between Brother Hu Jia and the French player in the last jump? I calculated it like this:100.96-99.85 =1.13 (point). When calculating subtraction with decimal points, the decimal points must be aligned, otherwise it is easy to make mistakes. If you want to know the secret inside, please come to me!

6. Wear beads: Today is the last day of the May Day holiday. I checked my homework again and put it back in my schoolbag neatly. Next, I put a lot of my favorite beads on the table and dressed them as colorful beads. Because I just learned the unit of time, I tried how many beads I could wear in a minute, and found that just wearing a string was 30.

I started wearing the second string, this time while counting. When I wear 30 strings, it's about 1 minute. Students, how many of the five beads are there? I think so: one string is 30, and five strings are five 30s. It is much simpler to calculate by multiplication, 30×5= 150 (pieces). You see, there is a lot of math in life! You can also find math while playing.