Math diary 1
165438+1On October 24th, our school ushered in the annual sports meeting.
Track and field has 24 meters running back and forth, 60 meters, 100 meters, 200 meters, 400 meters, 800 meters, 1200 meters, 1500 meters, _ meters, softball and long jump. I found that they are all calculated in terms of time and length, and winning or losing is determined by numbers.
Exercise is also inseparable from mathematics!
Math diary 2
June Day is coming. After I finished my homework, my parents took me shopping. We came to the children's clothing store and saw many beautiful children's clothes. I chose a pair of trousers from 58 yuan and a skirt from 65 yuan. Dad said I brought 100 yuan. Is it enough? 58+65= 123 (yuan) I quickly told my father that 100 was not enough, and then my mother asked me how much money I had to change. 123- 100=23 (yuan), I told my mother that I was short of money from 23 yuan, and my aunt, who sells goods, praised me for studying well, and my heart was sweeter than drinking honey!
Math diary 3
In today's math class, I learned puzzles. I spelled ducklings, rabbits, small fish, trees and so on.
I use a small triangle as the duck's head and a parallelogram as the duck's nose. Use a big triangle as the duckling's body, a square as the duckling's leg, a big triangle as its tail and two small triangles as its feet. I can spell many different shapes.
Math diary 4
Calculate the sum of 5+6+7+8+9+10+12+13+14+15. How can we get a quick and correct result? Add them up one by one from left to right, which is slow and easy to make mistakes. I carefully observed the characteristics of each number in the formula and found that 5+ 15=20, 6+ 14=20, 7+ 13=20, 8+ 12=20, 9+1/.
Math diary 5
The rated power of my cabinet air conditioner is 1400kw, the power consumption for 0 hours is 1.4 kWh, and that for 8 hours is1.4kwh.. The electricity consumption is1.4 χ 8 =11.2 kwh, calculated as 30 days a month.
Math diary 6
Today, my mother gave me a question: there are 10 heads and 30 legs in a cage. How many chickens and rabbits are there in the cage? I think: rabbits have four legs and chickens have two legs. If there is 10 chicken with only 20 legs, I add 2 legs, and it is a rabbit. I will add 5 rabbits until I have 30 legs, so I know there are 5 rabbits and 5 chickens.
Math diary 7
On Sunday morning, my grandfather and I went to the pharmacy in Outang and bought two boxes of tablets-Weiershu.
Two boxes of medicine 44 yuan and one box of 22 yuan. Grandpa gave her 50 yuan, and the clerk gave it to Grandpa 6 yuan.
After I found the change, I calculated it with decimal addition and subtraction. Grandpa can also pay like this:
Give it to 40 yuan, the shop assistant, and then pay 5 yuan 1 yuan.
2. If Grandpa has change, he can pay 40 yuan first and then 4 yuan.
By buying medicine with grandpa this time, I know that mathematics is closely related to our lives.
Math diary 8
On Saturday, my mother and sister and I went shopping in Hualian Supermarket. We bought a packet of Dali egg yolk pie 6 yuan 2 jiao, a packet of Xerox potato chips 4 yuan 9 jiao, and a packet of tissue 5 yuan. Mom asked me how much I had to pay before she paid. After careful consideration, I finally got 16 yuan 1 angle. Mom praised me. What the teacher taught us is really useful.
Math diary 9
During the May Day holiday, the five of us drove for about 2 hours and 300 kilometers to the beautiful Husha Lake. There are golden beaches, green reeds and blue lakes. We took a speedboat with a speed of about 70 kilometers per hour and reached the opposite side of the lake. I saw camel teams lined up with ropes, each with 8 heads, and each team could carry 16 passengers. After riding the camel, the tour guide organized 40 tourists to take five cable cars in the air. Eight cable cars are moving slowly along the track. I sat on the cable car and looked around. There is a mysterious bird island and bird watching platform in the distance ... Husha Lake deserves to be a tourist attraction in the western region.
Math diary 10
In order to finish the homework assigned by the teacher, my mother and I used 20 yuan money to go to the vegetable market to buy food. I took a 20 yuan and went to the vegetable section to buy soybeans, 8 yuan, eggplant 3 yuan and pork 9 yuan in the meat section. Haha, 20 yuan has just run out. Although my mother helped me a lot, I still feel very happy! I can also buy food.
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