Math diary, Grade Two, Book Two 1
20 1X year x month x day sunny day
It was Saturday, and my mother and I happily went shopping in the supermarket.
When I entered the supermarket, I was dazzled by the lively and dazzling things inside. I hurried to the school supplies area and chose three extracurricular books and 1 stick figure. My mother said, Ying Yi, didn't you just learn multiplication and division? You work out how much a * * * costs. I looked at the prices of extra-curricular books, and every 5 yuan and 3 yuan is a stick figure. I confidently said to my mother. Piece of cake, let me tell you! First of all, I use multiplication and addition to calculate, the price of three books is the sum of three fives, 1 stick figure is 3 yuan, and I use 3? 5+3= 18 yuan. I can also calculate by multiplication and subtraction. Think of each book as 5 yuan first. In this case, 4? 5=20 (yuan), but the stick figure difference 2 yuan is not enough for 5 yuan, so we use 20-2= 18 (yuan). Do you think I'm right? My mother praised me and said, you are great. ? Next, we selected some goods, and I helped my mother calculate the price before leaving the mall with satisfaction. I am so happy today! I can use what I have learned to solve problems in my life!
Math diary II, the second grade of primary school.
20 1X year x month x day sunny day
Today, I play Rubik's Cube at home. When my mother saw it, she picked up the Rubik's Cube and asked me, Qiqi, do you know how many cubes there are? There are 9 pieces on each side, and a cube has 6 sides, so 6*9=54 pieces? Mom smiled at this:? Qiqi, your calculation is wrong. Look at the Rubik's cube carefully. ? After listening to my mother's words, I picked up the Rubik's Cube and looked at it carefully. I suddenly found that there are only 9 Rubik's cubes on each floor, and the Rubik's cube has three floors. After careful calculation, it should be 3*9=27 yuan. I picked up the Rubik's cube and cheered happily. My mother asked with a smile. Do you know that?/You know what? I nodded happily.
Through this incident, I know that children's toys also have fun math knowledge, so look for them carefully!
Math diary, the second grade of primary school, Chapter 3
20 1X year x month x day sunny day
In the morning, my father took me to school and passed the breakfast stall. My father took me to have breakfast. A steamed stuffed bun costs 50 cents each 1 yuan, and a bowl of old tofu from 2 yuan. My father and I ordered two steamed stuffed buns, 1 fried dough sticks and two bowls of old tofu. When we were eating, I counted: two bowls of old tofu are two 2 yuan, so it is 2 *. After dinner, my dad gave the boss 10 yuan, and the boss asked my dad 5 yuan for money, so I said to my dad. Dad, the boss gave you the wrong change. Should I call you 4 yuan? At this time, the boss also heard it and said? It doesn't matter. The child is so honest, so clever, and can settle accounts. Can I give you a discount? . Dad smiled, and so did I.
It turns out that mathematics knowledge is hidden everywhere in life, secretly telling you that careless children can't get it.