The first article: jigsaw puzzle.

In today's math class, I learned puzzles. I spelled ducklings, rabbits, small fish, trees and so on.

I use a small triangle as the duck's head and a parallelogram as the duck's nose. Use a big triangle as the duckling's body, a square as the duckling's leg, a big triangle as its tail and two small triangles as its feet. I can spell many different shapes.

Chapter 2: Tangram Game.

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.

Article 3: 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. Is 80 _ 50 = 30 yuan. My mother smiled and nodded and said, "Mathematics comes from life."