Life examples solved with mathematical knowledge The best way to solve life problems with mathematical knowledge is at the level of junior high school,

Life examples solved with mathematical knowledge The best way to solve life problems with mathematical knowledge is at the level of junior high school,

The number of fish in the pond was estimated by the estimation method for the boss
Calculate the volume of the bottle
Area of column paint
The volume of the box

Mathematics composition of grade five in primary school
Urgent! Must be more than 400 words_ Thank you

Mathematics essay of grade five in primary school

Early this morning, I wanted to watch the computer, but the computer was occupied by my father. I was unconvinced and said, "why can't I watch it?" my father said with a smile, "let's play a game, rob newspaper 30, if you lose, I'll watch the computer, and if you win, you can watch it, OK?" I thought to myself: what kind of idea is my father playing? Whatever! Just play it, Who is afraid of who! I agreed. The rules of this tour are very simple: everyone can report 3 natural numbers at most each time, and at least 1 natural number at least. They can't repeat or skip when reporting numbers. Whoever reports 30 first wins
This is simple. I played a game with my father, and I lost. I was not convinced. I came here several times, and I lost and won. Is there any rule? I noticed that as long as I get the number 26 first, I will win. Because if I get the number 26 first, and there are four numbers from the number 30, according to the rules of the game, the number reported each time is at most three, at least one, then, When my father reported one number of "27", I reported three numbers of "28, 29, 30", and I got 30 first; when my father reported two numbers of "27, 28", I reported two numbers of "29, 30", and I got 30 first; when my father reported three numbers of "27, 28, 29", I reported one number of "30", and I won. It seems that the number 26 is absolutely the guarantee of victory, In addition to the number 26? In the previous round, I have to determine which number to win. According to the method of grabbing the number 26 first, I calculated: if I want to win, I have to remember these numbers in every round. They are 22, 18, 14, 10, 6 and 2. So, is this the rule of the game?
I said 3,4, dad said 5,6, and dad got 6 again! I said 7,8,9, Dad reported 10,11,12, I quickly reported 13,14, I was secretly happy, I finally got 10! Then, Dad reported 3 numbers, I reported 1 number; dad reported 2 numbers, I reported 1 number, I will report 2 numbers; dad will report 1 number, I will report 3 numbers. I won! Dad was not convinced, and played several games, but I mastered the law, how can I win. Dad asked: "how so coincidental?" I said with a smile: "this is not accidental, coincidence, but I found the law!" Dad also laughed: "in fact, I know, You are really smart. "Then, dad told me the rules again. This cunning Dad! If you don't tell me, I'll have to think about it!
So there are so many mathematical rules in the game! As long as we use our brains more, we can find them