Keywords: fifth grade of ant fairy tale primary school

This article is suitable for: the fifth grade of primary school.

Composition source:

This composition is about the fifth grade of primary school. The topic is: Mathematical Fairy Tales: Little Ants Carrying Rice. Welcome to contribute enthusiastically.

Math fairy tale: Little ants transport rice.

Story background:

There are a bunch of ants carrying food under the bench of Taihaoling, and my daughter counts them and enjoys them with great interest. In the evening, when she returned to the hotel, the little girl was completely awake. So, we make up stories word by word. ...

A little ant found a pile of rice grains. He is so happy that he can make a fortune today. Then count, 1, 2, 3...26, 27, wow, one ***27 capsules!

However, the little ants are very worried. How can they transport all these little grains of rice back? Yes, let me try to see how many pills I can deliver at a time. 1 capsule, 2 capsules, 3 capsules. Wow, I can ship three capsules at a time!

Oh, not yet. What should I do if someone steals the remaining 24 tablets after I leave? The little ant is worried again.

Well, yes, I'm just looking for more friends nearby to help. So the little ant began to look for new friends. (After a while) He found a group! However, the little ant is worried again: how many people should I invite? Thinking and thinking, the more I think about it, the more I feel. So he drew on the ground:

Please send one or three pills,

Two, please -3+3=6 tablets,

Please send 3 -3+3+3=9 capsules.

Please send four capsules -3+3+3 = 12 capsules.

Please send 5-3+3+3+3 = 15 capsules.

Please send six-3+3+3+3 =18 capsules.

Please send seven -3+3+3+3+3+3+3 = 2 1 capsule.

Please send eight-3+3+3+3+3+3+3+3 = 24 capsules.

The little ant who just finished eating cried excitedly. Well, eight is enough!

So the little ant invited eight new partners and happily transported all the rice grains home.

Back home, (the little ant told his mother about the process of transporting rice), and her mother praised the little ant for being really capable! But the little ant's sister heard it and said proudly (disapprovingly), "Your algorithm is childish. I have a better way to calculate how many people are invited at a time. "

The little ant (blinked) said to his sister, "Good sister, tell me quickly!" " "Sister ant proudly said:

"A total of *** 27 grains of rice, 3 grains per person (at a time), * * * VIP.

27/3=9 (only). Subtract yourself, invite eight more, and it's OK! "

The little ant nodded, envious of her sister! (Thinking) This calculation is really much more convenient than adding up three capsules. It seems that you have to study hard in the future! )

(Note: the words in brackets were said by my mother, and the sentences were smoothed and adjusted when uploaded)

Date of creation: 20 10-08-2 1