生活中的数学日记300字【8篇】

要想在考试中取得好成绩就必须注重平时的练习与积累，为大家整理了生活中的数学日记，小朋友们一定要仔细阅读哦！下面是作文迷整理的生活中的数学日记300字【8篇】，您的肯定与分享是对小编最大的鼓励。

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数学日记200字 篇1数学日记300字 篇2数学日记300字 篇3数学日记300字 篇4数学日记200字 篇5数学日记300字 篇6数学日记300字 篇7数学日记300字 篇8

数学日记200字 篇1

今天早晨，我和爸爸妈妈一起去吃早饭，我们走进一家小饭馆。点了肉包5个，每个1.5元，一共7.5元。山珍野菜包4个，每个1.2元，一共4.8元。韭菜鸡蛋包4个，每个1.2元，一共4.8元。豆腐脑2碗，每碗3.0元，一共6.0元。奶茶一杯每杯3.0元，总共26.1元。

This morning, my parents and I went to have breakfast together. We walked into a small restaurant. I ordered five meat buns, each worth 1.5 yuan, a total of 7.5 yuan. There are 4 wild vegetable buns, 1.2 yuan each, 4.8 yuan in total. Four leek egg buns, 1.2 yuan each, 4.8 yuan in total. Two bowls of bean curd, 3.0 yuan each, 6.0 yuan in total. A cup of milk tea is 3.0 yuan per cup, 26.1 yuan in total.

妈妈付了50元，找回23.9元。爸爸吃了1个肉包，3个菜包，1碗豆腐脑，花了1.2x3+1.5+3=8.1（元），妈妈也吃了这么多，花了8.1元，我吃了3个肉包，2个菜包，1杯奶茶，花了1.5x3+1.2x2+3.0=9.9（元）。每个人平均花了26.1/3=8.7（元）。

Mother paid 50 yuan and got 23.9 yuan back. Dad ate 1 meat bun, 3 vegetable buns, and 1 bowl of bean curd brain, which cost 1.2X3+1.5+3=8.1 (yuan). Mom also ate so much, which cost 8.1 yuan. I ate 3 meat buns, 2 vegetable buns, and 1 cup of milk tea, which cost 1.5X3+1.2X2+3.0=9.9 (yuan). Each person spent 26.1/3=8.7 yuan on average.

我吃饱了，我还学到了知识，和爸爸妈妈高高兴兴地回家去了。

I was full, I learned knowledge and went home happily with my parents.

数学日记300字 篇2

11月14日 星期日 天气：晴

Sunday, November 14 Weather: Sunny

斀裉彀晚，我和表姐在操场上玩，我们在操场边发现一张面积大约是一平方米的正方形废纸板，表姐看了看，说：”小婧，如果把这个纸板分割成一个个面积为一平方毫米的小正方形，再把这些小正方形一个紧挨一个的接成一条直线，这条直线会有多长呢？”我不假思索地脱口而出：”这能有多长，顶多不过四米吧！”表姐笑了笑说：”你先别急着下结论，让我们一起来算算吧。”

My cousin and I were playing on the playground. We found a piece of square waste cardboard with an area of about one square meter near the playground. My cousin looked at it and said, "Xiao Jing, if you divide the cardboard into small squares with an area of one square millimeter, and then connect these small squares one by one into a straight line, how long will the straight line be?" Without thinking, I blurted out: "This can be as long as four meters at most!" Cousin smiled and said, "Don't jump to conclusions, let's calculate together."

开始了片刻的思考：1平方米等于100平方分米，……1000000平方毫米的正方形的边长就是1000000毫米，那1000000毫米不就是100米吗？哇！这条由一些一平方毫米的小正方形拼成的直线竟长达100米。

I began to think for a moment: 1 square meter is equal to 100 square decimeters,...... The side length of a 1000000 square millimeter is 1000000 millimeters, and then 1000000 millimeters is 100 meters? Wow! This straight line, which is made up of some small squares of one square millimeter, is 100 meters long.

我明白学习数学不能只是简单地把题目看一看，就轻易的下结论，应该认真想、仔细算，才能做得对，并探究到其中的奥妙。

I understand that learning mathematics can not simply look at the topic and easily draw conclusions. We should think carefully and calculate carefully, so that we can do it correctly and explore the mystery.

数学日记300字 篇3

星期天早上，我和爷爷去荷塘药店买了两盒药丸——胃二舒，两盒44元，一盒22元。爷爷给了她50块钱，售货员给了爷爷6块钱。找到钱后，我用十进制加减算了一下。

On Sunday morning, my grandfather and I went to the Hetang Drugstore to buy two boxes of pills Weiershu, two boxes of which cost 44 yuan, and one box of which cost 22 yuan. Grandpa gave her 50 yuan and the salesperson gave him 6 yuan. When I found the money, I added and subtracted it in decimal system.

爷爷也可以这样付钱:1.先付售货员40元，再付5元找1元。2.如果爷爷有零钱，可以先交40元，再交4元。通过这次和爷爷买药，我知道数学和我们的生活息息相关。

Grandpa can also pay like this: 1. Pay the salesperson 40 yuan first, and then pay 5 yuan to change 1 yuan. 2. If Grandpa has change, he can pay 40 yuan first and then 4 yuan. Through buying medicine with my grandfather this time, I know that mathematics is closely related to our life.

还有一次，我和姐姐去超市买东西。买了一包牛肉干，一瓶牛奶，一瓶汽水，花了我10块钱。赵霖买了一盒饼干和一瓶汽水，总共9元钱。我们给了店主20元钱。

Another time, my sister and I went shopping in the supermarket. It cost me 10 yuan to buy a bag of beef jerky, a bottle of milk and a bottle of soda. Zhao Lin bought a box of biscuits and a bottle of soda for 9 yuan. We gave the shopkeeper 20 yuan.

店主给了我们2元钱。当我们准备回家时，赵霖说:“我想买10个泡泡糖。”我拿出钱，发现店主从1块钱给我的钱多了。我们回去把1块钱多找给他。店主称赞我们是诚实的孩子，这让我们感到甜蜜。

The shopkeeper gave us 2 yuan. When we were ready to go home, Zhao Lin said, "I want to buy 10 bubble gum." I took out the money and found that the shopkeeper gave me more money from one yuan. Let's go back and give him more than one yuan. The shopkeeper praised us as honest children, which made us feel sweet.

数学日记300字 篇4

张老师是我的数学老师。她长长的头发，大大的眼睛，好像会说话。她和蔼可亲，脸上总是挂着慈祥的微笑。张老师为了我们的学习，想出了各种办法，总能使我们高高兴兴、快快乐乐地去学习。一次，老师在黑板上出了几道题，让我们做。如果谁全做对了，就可以得到一个和老师拍手的奖励。我全做对了，心里很激动，想到老师和我拍手会有什么感觉和景象。

Mr. Zhang is my math teacher. With her long hair and big eyes, she seems to be able to speak. She is kind and always has a kind smile on her face. Teacher Zhang has come up with various methods for our study, which can always make us study happily. Once, the teacher set several questions on the blackboard and let us do them. If everyone does everything right, they can get a reward for clapping hands with the teacher. I did everything right. I was very excited. What would I feel and see when I thought of the teacher clapping my hands with me.

“叮零零……”放学了。做对的同学争着往张老师那儿跑，我也不例外。轮到我了，我慢慢地把手伸过去，一只温暖的大手在我的手上轻轻地拍了一下，我觉得一股热气充满全身。从此，我更爱学习了。

"Ding zero......" School is over. The students who did the right thing rushed to Miss Zhang, and I was no exception. It was my turn. I slowly extended my hand. A warm big hand gently patted my hand. I felt a warm air filled my whole body. Since then, I love learning more.

还有一次，我马虎了，做错了一道题，名字被记到了黑板上。张老师对我说：“马虎了吧？蒿晨，努力吧。老师盼望你≮www..cn≯期末考好呢。”我听了，含着泪点了点头。

Another time, I was careless and did a wrong question. My name was recorded on the blackboard. Teacher Zhang said to me, "Are you careless? Try your best, Hao Chen. The teacher hopes you will not fail in the final exam." I listened and nodded with tears.

数学日记200字 篇5

9月26日星期日晴

Sunny Sunday, September 26

星期天，我和爸爸去买菜。

On Sunday, my father and I went shopping.

我们来到卖西红柿的地方，爸爸问：“多少钱？”老板说“1元2角1斤。”“我买3斤。”爸爸说道。老板称了3斤。爸爸问我“你算一算，一共要多少钱？”我想：容易，1.2乘以3，不就等于3.6元吗！我爽快答道：“3.6元。”爸爸幽默

When we came to the place where tomatoes were sold, my father asked, "How much is it?" The boss said, "1 yuan, 2 jiao, 1 jin." "I'll take 3 jin." Dad said. The boss weighed 3 jin. Dad asked me, "How much do you want?" I think: easy, 1.2 times 3, is not equal to 3.6 yuan! I quickly replied, "3.6 yuan." Dad is humorous

地说：“恭喜你，答对了！”爸爸付了钱后，来到了卖菜的地方。他问：“这白菜多少钱1斤？”女老板说：“1元5角。”爸爸又问我：“我买2斤，现在我有5元，老板该找回我多少钱？”我想：1.5乘以2等于3元，5元再减3元，那就等于2元。”我答道：“找回2元。”爸爸说：“YES!”

He said, "Congratulations, you answered correctly!" Dad paid the money and went to the place where the vegetables were sold. He asked, "How much is a kilo of cabbage?" The female boss said, "One yuan and fifty cents." My father asked me again: "I bought 2 kg, and now I have 5 yuan. How much should the boss give me back?" I think: 1.5 times 2 equals 3 yuan, and 5 yuan minus 3 yuan equals 2 yuan. " I replied, "Get back 2 yuan." Dad said, "YES!"

走出菜场，我恍然大悟：原来，数学在生活中也是常常用到的。

Walking out of the vegetable market, I suddenly realized that mathematics is often used in life.

数学日记300字 篇6

生活中处处充满了数学，数学也普遍应用到了生活中，在一天的下午，我就遇到了一个生活中的数学难题。

Life is full of mathematics, and mathematics is also widely used in life. One afternoon, I met a mathematical problem in life.

那天，老妈给我出了一道数学题，要我测算一根筷子的体积，并用日记的形式记录下来。我坐在沙发上仔细端详着筷子，这根筷子是不规则的立体图形，有粗有细到底该怎样算呢？

That day, my mother gave me a math problem and asked me to measure the volume of a chopstick and record it in a diary. I sat on the sofa and looked carefully at the chopsticks. The chopsticks were irregular three-dimensional figures. What should we do if they were thick or thin?

突然，我脑子里萌生出一个想法。用一个装满水的容器放入筷子。一出来的水的体积不就是筷子的体积了吗？但是，筷子太轻了，会浮在水上。于是，我决定用胶布将筷子缠上，放入水中，溢出来的水减去胶布的重量不就是筷子的体积了吗。我按照此方法做，结果算出来一根筷子是3，29克。

Suddenly, an idea came into my mind. Put chopsticks in a container filled with water. Isn't the volume of water coming out the same as that of chopsticks? However, chopsticks are too light to float on water. So I decided to wrap the chopsticks with adhesive tape and put them into the water. The overflowing water minus the weight of the adhesive tape is the size of the chopsticks. I follow this method, and the result is that a chopstick is 3, 29 grams.

通过这次实验，让我体会到方法固然重要，但是不一定这种方法都能成功，有时也需要变通一下方法，才有可能成功。

Through this experiment, I realized that although the method is important, it may not be successful, and sometimes it needs to be modified to be successful.

数学日记300字 篇7

星期六 晴

Saturday sunny

今天妈妈教我玩扑克牌游戏，一副扑克牌不要大小王，J、Q、K是数字零、A是1，其它的不变。每人放两张在桌上，看谁能用加减乘除算出得数等于24，四张牌不能重复用。妈妈示范了几次给我看，我看明白了，于是我们就开始玩。我有好多都算不出来，但出了这样的四张牌我算出来了，8一张、3一张、j一张、A 一张，我想3×8×1+0＝24。妈妈夸我好聪明，后来我还算对了一题，7一张、8一张、9一张、A一张，我想了好久，原来是（7+8+9）×1=24。还有最简单的一题我很快就算出来了，那就是4一张、6一张、Q一张、J一张，4×6+0+0＝24，我玩得很开心。妈妈说玩这样的游戏可以使我的口算能力加强，所以我要经常玩。

Today, my mother taught me to play a card game. A deck of cards does not need big or small kings. J, Q, K are zero, A is 1, and the rest is the same. Each person puts two cards on the table to see who can use addition, subtraction, multiplication and division to calculate that the result is 24. The four cards cannot be used repeatedly. My mother demonstrated it to me several times, and I understood it, so we began to play. I can't figure out a lot, but I can figure out such four cards: eight, three, J, A, I think three × eight × 1+0＝24。 My mother praised me for being so smart. Later, I got a correct answer: 7, 8, 9, A, and I thought about it for a long time. It was (7+8+9) × 1=24。 There is also the simplest question that I can figure out quickly, that is, 4, 6, Q, J, 4 × 6+0+0=24, I had a good time. My mother said that playing such games can strengthen my mental arithmetic ability, so I should play them often.

老师评语：希望你能通过玩这种游戏提高口算速度。

Teacher's comment: I hope you can improve your mental arithmetic speed by playing this game.

数学日记300字 篇8

今天上午，我学完游泳回到家，妈妈说：“我们来作个数学游戏吧！”

This morning, when I came home from swimming, my mother said, "Let's play a math game."

妈妈告诉我说：“你已经学过钟表的知识了，就做个钟表知识的游戏。”游戏规则是这样的：小方家的钟除了几点敲几下外，每半点也敲一下。比如说：0点半敲一下，1点种敲一下，一点半敲一下，两点敲两下，两点半敲一下……照这样下去，从夜里0点开始，几到白天中午12点钟，在这12个小时之内时钟共敲了多少下？

My mother told me, "You have learned the knowledge of clocks, so you can play a game about clocks." The rules of the game are as follows: The clock of Xiao Fang's family strikes every half of the clock, in addition to several times. For example: a knock at half past zero, a knock at half past one, a knock at half past one, a knock at two, a knock at half past two... How many times has the clock struck in the 12 hours from 0 o'clock at night to 12 o'clock at noon?

我第一次算，粗心大意算成了九十一。

The first time I calculated, it was ninety-one if I was careless.

我第二次算，我是这样算得：去掉整时，半小时就有十二个，加起来就成了12；从一加到十用了凑十法，一加九等于十，二加八等于十……等于55，是高斯定律。55＋12＋11＋12＝90。我算出要敲90下，对了，我很高兴！

The second time I calculated, I calculated as follows: if you take away the whole hour, there will be twelve in half an hour, which adds up to 12; From one to ten, we use the rounding method. One plus nine equals ten, two plus eight equals ten... equals 55, which is Gauss's law. 55＋12＋11＋12＝90。 I calculated that I would knock 90 times. By the way, I'm very happy!

在日常生活中也有数学，我觉得数学很有趣。

There is also mathematics in daily life. I think mathematics is very interesting.