Today, the teacher taught us the jigsaw puzzle, which consists of a parallelogram, a square and five triangles.

In our daily life, we can't do without the basic plane graphics in the puzzle, which can spell out interesting graphics, such as trees, houses, little girls, kittens and so on. As long as we study hard and love to operate, puzzles can be useful and interesting.

Comments: The little author loves to use his head, pose, spell and draw pictures. He is a child who loves learning.

Chapter II "Filling Teeth"

Today, my mother took me to the stomatological hospital to see my teeth, because there are many small holes in my teeth. After the doctor examined me, he said it needed mending. Filling a tooth hurts, but I can persist.

It takes about 65,438+0 hours to complete the filling. One * * * filled eight teeth, and each tooth spent 10 yuan. My mother asked me how much I should pay. I think eight 65,438+00 is 80, and one * * * costs 80 yuan. My mother praised me for my eloquence, yes. The dentist in this hospital is my mother's colleague and only charged us 50 yuan. My mother asked me how much the discount was, so I didn't have to think about it. It was 80-50 = 30 yuan. My mother smiled and nodded and said, "Mathematics comes from life."

Comments: The little author is usually good at observing things. She is very active in learning and loves to use her head. She is a clever child.

Chapter 3 "Puzzling Mathematical Problems"

I saw a puzzling math problem tonight. The topic is: 37 students want to cross the river. There is an empty boat at the ferry that can only take five people. How many times must they cross the river with this boat at least?

Careless people often ignore the "empty boat", that is, forget to have a gondola, so they can only take four people at a time. In this way, 37 people subtract one rowing classmate, leaving 36 students, 36 divided by 4 equals 9, and the classmate who worked as a boatman on the other side for the last time also landed 4, so it takes at least 9 trips.

Article 4 "Animal Games"

The sports meeting has started! The sports meeting has started! I only heard the small animals shouting, and soon 9 rabbits, 27 puppies, 36 monkeys, 6 kittens and 34 kangaroos appeared on the sports field, competing for this sports event, regardless of the outcome.

At this time, the elephant on the side made a suggestion and said, "Ask the math questions and decide who will apply for this project." Everyone's interest has come, and some people have suggested: How many kittens are less than puppies? Formula 27-6=2 1 (only one), someone suggested: How many rabbits are less than kangaroos? Equation 34-9=25 (only), they are all scrambling to ask questions. Finally, kittens run and jump, kangaroos jump and jump, rabbits jump rope and jump, and monkeys run and jump. The animals compete fairly and are very lively.

Comments: The little author's observation ability is extremely strong, and he usually likes to use his hands and brains. The article is clear and fluent, and I am very interested in mathematics.

Chapter V "Understanding RMB"

In today's math class, we got to know RMB. Its face value is 100 yuan, 50 yuan, 20 yuan, 10 yuan, 5 yuan, 2 yuan, 1 yuan, 5 points, 0 points, 5 points, 2 points, 1 minute. I see. There are five RMB 10 in 50 yuan, and five RMB 1 is 50, 1 = 10, 1 = 10. I also know that there are two kinds of RMB, one is paper money and the other is coins.

We should not scribble on the RMB, but cherish it. Save money from an early age, don't misuse it, and form good habits.

Comments: The little author's articles are clear and fluent, and he is very interested in mathematics.