# Senior One # Introduction math diary is an extension of classroom teaching. In teaching, students should learn something related to what they have learned through various channels, and express it in the form of math diary according to their own understanding, which can not only broaden their mathematical horizons, but also cultivate their practical application ability. The following is the relevant information of "Seven Diaries of Mathematics Winter Vacation in Grade One of Primary School", hoping to help you.

1. Winter Holiday Diary of Mathematics in Grade One of Primary School

On the day of 65438+ 10 18, I accompanied my mother to the streets to buy new year's goods. When we came to the supermarket, we started shopping. After buying, I went to the cashier, where there was a long queue. I ran to the front to see the situation. It turned out that there was an activity in front: customers who bought more than 200 yuan could only pay 70% of the total price. I told the news to my mother, who asked me to work out how much money we had to pay. After I worked it out, the result was 283.5 yuan.

My mother asked me: if so, how much do we actually have to pay? I think: 283.5 times 70% equals 198.45 yuan.

Then she replied to her mother: We actually have to pay 198.45 yuan, right? My mother thought about it and said to me, yes! How clever! Mom invites you to eat KFC to reward you!

2. Diary of winter vacation of mathematics in the first grade of primary school

Today, I waited patiently for my father to buy wine at the gate of the community. Suddenly, the security guard spoke and said, "Little friend, it's Arbor Day soon. We may plant trees in Haiqinyuan Community. May I ask you a question? " I was shocked at that time, and the security guard wanted to ask me questions! Uncle Security then asked me, "We want to plant 18 trees, both sides. How many trees should we plant on each side? " I quickly replied: "9 trees." Hearing this, the security guard happily said to me, "Little friend, you are so smart!" " "After a while, my father came back, and the security guard greatly praised me in front of my father. I was flattered to hear that. Oh, so this is the division taught by Teacher Zhang! I can also do formulas. 18÷2=9 (tree)

3. Winter Holiday Diary of Mathematics in Grade One of Primary School

Today, after I finished my math homework, I read a math book. When I got to the question 10 on page 54, I was wondering how much it really matters. According to two related quantities, we can compare them, such as the age ratio between my father and me; The ratio of the annual salary of mom and dad to the monthly salary of mom and dad. Two unrelated quantities cannot be compared. My age can't compare with my parents' salary. The former term and the latter term of the ratio are interchangeable.

I thought for a while and came up with three kinds, namely: the age ratio between my father and me is 12: 43, and the annual salary ratio between my father and my mother is 30: 29. The monthly salary ratio of mom and dad is 30: 29.

After thinking about it, I told my parents about it and they all praised me. I am very happy, and my heart is sweeter than eating honey!

4. Winter Holiday Diary of Mathematics in Grade One of Primary School

I saw a puzzling math problem tonight. The topic is: 37 students want to cross the river. There is an empty boat at the ferry that can only take five people. How many times must they cross the river with this boat at least? Careless people often ignore the "empty boat", that is, they forget to have punting, so they can only sit four people at a time. In this way, 37 people subtract one rowing classmate, leaving 36 students, 36 divided by 4 equals 9, and the classmate who worked as a boatman on the other side for the last time also landed 4, so it takes at least 9 trips.

5. Winter Holiday Diary of Mathematics in Grade One of Primary School

Today is grandma's birthday, so we went to buy a cake. When we came to my grandmother's house, we divided the cake into eight equal parts and gave them two each. They eat 4/8 of 8 cakes, and my parents and I each eat one. The cake we ate was eight-thirds of the eight cakes.

Dad asked me, "How many cakes do you think the five of us ate?" ? How many pieces are left? "I think: Grandpa and Grandma * * * are four pieces, and the three of us * * * ate three pieces. A * * * adds up to 4+3=7 (blocks), and a * * * divides the cake into eight pieces, and 8-7= 1 (blocks). I replied, "We ate seven cakes and there was one left. "

"You are really capable!" Dad praised me and said, "I'll give you the rest!" " "

Ah! There is a lot of math in life!

6. Winter Holiday Diary of Mathematics in Grade One of Primary School

I'm going to learn to dance tonight, because I don't have any water. So, we are going to the supermarket to buy a bottle of mineral water. Mom usually buys it, so I don't even know how much a bottle of water costs. Mom gave me one yuan, but! Aunt salesgirl said it wasn't enough. A bottle of mineral water costs 4 yuan money. Wow! It is four times more expensive than I expected.

I ran out to ask my mother for money again. My mother gave me ten yuan this time, and I gave it to my assistant aunt.

I calculated it myself, 10 yuan -4 yuan =6 yuan, and the aunt of the salesgirl should call me 6 yuan. My calculation is very accurate. My aunt, the shop assistant, gave me 6 yuan money.

I gave the rest of the money to my mother, and she praised me for being great!

7. Winter Holiday Diary of Mathematics in Grade One of Primary School

Today is the Dragon Boat Festival. Mom bought dumpling wrappers, and our family was very happy. In Jiaozi, I installed 15, my father installed 2 1, and my mother installed 30. My father said he would test my math study. The question is: How many jiaozi? 15+2 1+30=66 (pieces). Jiaozi is ready, I ate 10, my father ate 25, my mother ate 5, and my mother said, how many are left? 66- 10-25-5=26 (a) My parents smiled happily and praised me for learning math well.