Math diary 1.

20xx 165438+1October16 Sunday weather: sunny.

The other day, we went to "Happy Valley" to play. The adult entrance ticket price of Happy Valley is: 140 yuan; Half a ticket for children. While waiting in line to buy tickets, my mother asked me to calculate how many tickets we need to buy. I blurted out, "I want 700 yuan." My mother asked me in surprise how I calculated so fast. Actually, I think so: four half-price tickets for children are equal to two adult tickets, plus three adult tickets are exactly five adult tickets, and five tickets for 140 are exactly equal to 700 yuan. Mom praised me for being great!

Math diary II.

The weather will be fine on Sunday, May 8th.

On the way to school, I saw a shop open. There are two atmospheric flowers hanging on both sides of the shop. There are 12 big red flowers in the middle door, which are made of red silk. Very beautiful. On both sides of the building, from top to bottom, there are also 29 colored cloth strips with four big characters, "Business is booming". I calculated that 2 plus 12 plus 29 equals 43. I'm glad I can work out the formula of continuous addition.

Math diary III.

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.