Keywords: Tree Planting Mathematics Primary School Grade One

This article applies to: the first grade of primary school.

Composition source:

This composition (600 words) is about the first grade of primary school (600 words). The topic is "Mathematical Problems in Tree Planting". Welcome to contribute.

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Mathematical problems in tree planting

Xingfu ST primary school San Wu ban Zhang

Last weekend, my parents and I also came to the forest park in the western suburbs to participate in tree planting activities. Looking at the rows of trees after planting, rows of small trees are really beautiful. Then dad said, "Zhang, dad will give you a math problem." Now there are 9 trees. You can plant 3 rows with 4 trees in each row. How should you grow them? "Nine trees, three rows? 9÷3=3, the question requires 4 trees per row? Three trees are missing, oh! Then the three trees should belong to two rows at the same time, all kinds of 1 trees at the three vertices of the triangle, and two trees in the middle of each side, that's all. " Dad, I know the answer. Plant it into a triangle. "I replied." Zhang, great! Dare to come again. "Dad asked." Why not? I also want to be a' little mathematician'. Come out. "I replied.

Now there are 12 trees, and it is necessary to plant 4 rows with 4 trees in each row. How to plant it? 4×4= 16, there are 12 trees, and 4 trees are missing. I see, just like the last question, four trees must belong to two rows at the same time to meet the conditions. Plant 1 tree on the four vertices of the square, and plant 2 trees in the middle of each side. "Plant it in the square, Dad." "Young man, you can do it!" Dad patted me on the shoulder and said.

"Wife, come and give your son a problem. My questions have been answered by Zhang Yiyi. " Dad said to mom. "Son, there is another difficulty." Mom said. "Okay, no problem. Mention it. " I confidently said to my mother. "Now there are 10 trees, which need to be planted in 5 rows with 4 trees in each row. How should I plant them? " Mom said. "Oh, my God! 9 trees, planted in 3 rows. This 10 tree is more than 1 tree, but two more lines are needed. " I shouted. I picked up the branches under my feet and gestured on the ground, Fang? Triangle? None of them are right! It's too difficult!

"Zhang, come on!" Dad was there to cheer me up. "Comrade zhang, think again. Mom will announce the answer in five minutes. " Mom joked aside. 4×5=20, but now there are only 10 trees, so each tree must be regarded as one. What shape is it? Five elements? "★" five-pointed star? Yes, that's it. Plant 1 tree on its five corners respectively, and then plant 1 tree on the ∨∨ corner respectively. "Mom, I know, it's a five-pointed star!" I shouted at my mother. "Congratulations, it's the shape of a five-pointed star." Mom said, and bowed her head and kissed me.

Sitting on the bus back, I thought, "This math is really interesting. There are shadows of mathematics everywhere in life. " I will study math harder in the future.

(Thanks to Princess Kelly's sister's stationery)

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