1. math diary, Grade 2, 250 words.
After dinner, I went shopping with my father, mother and aunt. I bought 1 lollipop as soon as I went out, about 2 grams, one yuan. I ate and walked to the supermarket in RT Mart. Walking into the supermarket is really dazzling. I ordered two bottles of cashews. A bottle of 320g, two bottles of 2×320 = 640g；; I also ordered two bags of pistachios, a 200g bag and a 320g bag, and two bags of * * * 200+320 = 520g. Mom also bought many other things, such as pomegranate, toothbrush, toothpaste, paper towel, towel, pear, pumpkin, cantaloupe, eggplant ... Go to the cashier and count, wow! Guess how much? More than 600 yuan. What a surprise!
On the way home, my aunt said to me, "Kiki, you should study hard now. Your life is full of math problems. As long as you think hard, you will find surprises. " I said, "I see, life is wonderful!" " "
2. math diary 250 words in the second grade of primary school.
On May Day, we went to Xi 'an, the ancient city. When I came to the east gate of Xi 'an, I couldn't tell things apart. The guide sister pointed to our shadow and said, "Look at our shadow, can't you see the direction?" It's morning, and our shadow should face the west. Which way is north? "I thought to myself: the shadow faces west, then I will let my left hand face west, then my front is the north, my right hand is the east, and my back is the south! I pointed to the north and said to my sister, "That's the north! Right? " The tour guide sister said, "How clever! That's right! "Then the tour guide sister said that the city wall is in the west, outside the city is in the east, and the city wall is 13.47 kilometers, which is very, very long. Besides, he told us many historical stories and allusions. Unconsciously, it was 13: 00, 10: 00. We all forgot to have lunch! There is a lot of mathematics knowledge around us, which facilitates our life. We must study math well and make good use of it to help us live a better life!
3. math diary 250 words in the second grade of primary school.
Today, my father and I went shopping in the supermarket. Dad gave me 100 yuan to buy things by myself. I am extremely happy to hear that. Apples cost three yuan a catty, and dad bought four catties. My father asked how much it was. 3 times 4 equals 12 yuan. I answered. I walked up to the pear and saw that it said "2 yuan Jin", so I bought 2 Jin: 2 times 2 equals 4 yuan. When I came to the dairy section, I saw my favorite cheese at first sight. It says: A box of 9 yuan. Now that I'm here, I think I'll buy more. I took five boxes. Five times nine equals 45 yuan. I forgot how much it was worth. I calculated: 12+4+45 equals 6 1 yuan. First, 12+4 equals 16 yuan, and then 16+45 equals 6 1 yuan. Dad said,' Yo, arithmetic is ok.' A: of course. I said. I went to the vegetable section and bought a catty of water spinach. 2 yuan money, and bought three jins of carrots and 3 yuan money. Go to the beverage area and buy a bottle of Coca-Cola, a bottle of Sprite and a bottle of 5 yuan money. Two times five equals 10 yuan. Ok, I want to work out how much it will cost. 6 1+2+3+ 10 equals 76 yuan. There are a few dollars left. Haha, I can go to the snack area to buy snacks. After buying snacks, no more, no less, just 100 yuan. I said over dinner that this shopping was really interesting. '
4. math diary 250 words in the second grade of primary school.
Today, my mother took me shopping in the supermarket. When I arrived at the supermarket, my mother allowed me to choose two toys I like. Wow! There are so many toys on the shelf that I like them all! However, I chose two of my favorite toys: a tank and a transformer. The price of a tank is 42 yuan, and that of a transformer is 5 1 yuan. My mother gave me 100 yuan, and then I gave it to my aunt, the clerk. My aunt asked me how much change I should have. I thought for a moment and said, "100 minus 42 minus 5 1 equals 7 yuan". Aunt praised me for being so smart! Mom smiled happily at the side!
I'm glad to take my beloved toy home!
5. math diary 250 words in the second grade of primary school.
Today, my father and I went out to buy darts. When I got home, my father hung darts on the wall, played with me and taught me how to keep score. This dart is circular and divided into four circles along the radius. The red circle in the middle is 100 points, the second green circle is 40 points, the third red-green circle is 3 times division, and the fourth red-green circle is 2 times division. The outermost part consists of 20 black and white cells, and each cell corresponds to a score. Black, white, red, green and stainless steel gaskets form a beautiful pattern.
There are six darts. At first, we didn't follow the rules of the game, but each person threw darts three times to see who scored the most, so as to decide whether to win or lose. Dad scored 20 points for the first team, 3 times the 7 points for the second team and 0/8 points for the third team/kloc. How to calculate? That is 7×3+20+ 18=59 points. Playing darts not only exercised my oral expression ability and hand-eye coordination ability, but also brought me a lot of happiness. I like playing darts.
6. math diary 250 words in the second grade of primary school.
I read a question in a book today: a nine-square grid, fill in 1 to 9, so that the horizontal, vertical and diagonal lines of the nine-square grid add up to 15. At first, I tried many times without success. Later, I found a rule: as long as 7, 8 and 9 don't meet, 5 will always be in the middle. I use this trick to do the problem again, which is much easier to do. I worked it out at once. Here's what I did: first fill in 5 in the middle, 9 above 5, and 7 on the left; Fill in 8 in the lower right corner; Then I calculated, 5 1 below and 3/on the right; I fill in 2 in the upper left corner and 6 in the lower left corner; Finally, fill in 4 in the upper right corner, and it's done. I checked it again to make sure I did it right. This question looks simple, but it is a bit difficult to do. It is really interesting!