What are the math stories of the first grade in primary school?

1. When does the snail climb the well? A snail accidentally fell into a dry well. It lay at the bottom of the well and began to cry. A toad crawled over and whispered to the snail, "don't cry, little brother!" It's no use crying. The shaft wall is too high. If you fall here, you can only live here. I have been here for many years, and I haven't seen the sun for a long time, let alone want to eat swan meat! " The snail looked at the old and ugly toad and thought, "What a beautiful world outside the well! I can never live in a dark and cold well like it! " The snail said to the toad, "Uncle toad, I can't live here. I have to climb up! "! How deep is this well? ""Ha ha ha ..., are you kidding! The depth of this well is10m. How can you climb up with such a heavy shell at a young age? " "I am not afraid of suffering, not afraid of being tired. I can always climb out after a while every day! " The next day, the snail ate and drank enough and began to climb the wall. It kept climbing and finally climbed 5 meters at night. The snail was very happy and thought, "At this rate, I can climb up tomorrow night." Thinking about it, it fell asleep unconsciously. In the morning, the snail was awakened by a purr. At first glance, it turned out that Uncle Tu was still sleeping. It was surprised: "How come I am so close to the bottom of the well?" It turned out that this snail slipped 4 meters from the borehole wall after falling asleep. The snail sighed, gritted his teeth and began to climb again. At night, it climbed another 5 meters, but at night the snail slipped another 4 meters. Climb and climb, and finally the strong snail climbed up the well platform. Can you guess how many days it will take a snail to climb the drilling platform?

2. Once upon a time, a man named Gu hired a long-term worker named Zach and promised to pay him a cow every year. By the end of the year, Guyimu said to Zach, I have your salary, and you can do great things in the future. Honest Zach agreed. In a blink of an eye, 19 years passed, Zach was old and weak, and Mu Yi, the customer of the earth, wanted to dismiss him. One day, Gu Yimu called Zach and said, "You worked in my house for 19 years. Here's 19 Jin of oil. Go! " Zach listened and said, "Sir, how did your salary for a cow become a catty of oil every year?" Gu Muyi glared at him and growled, "That's because you heard wrong. Will the master still rely on you? " I kicked him out of the house without saying anything.

Zach was sitting on the side of the road with 19 Jin of oil. At this time, I happened to see two generations of love riding a little donkey. Zach quickly told Avanti about it and asked him to help calculate the salary. Afandi thought about it and said, OK, I'll go to Muyi's house with you to judge. "

Gumuyi was drinking at home when suddenly two generations of love and Zach came in. Gu Muyi was a little flustered and smiled and said, "Mr. Two generations of love have arrived. What can I do for you? " Afandi said, "Zach wants to do some small business, and he has come to lend me three taels of silver, and I will guarantee it. I wonder if the master will agree. " Listen to the gu, this just relieved, even said, "of course, Mr. Do the guarantor. Zach is an honest man, and the annual interest rate is good for this. " So, the third officer wrote IOUs on six sides. Gu was about to get the money when he was grabbed by a hand and said, "It's fair to do things, and the money I lent you was good. Then, a pound of oil a year for two generations should be good for Ben. " Gu rolled his eyes and wondered how much interest 19 kg of oil could bring him. It was a big deal. He said, "well, for the sake of two generations of Mr. Love, I will pay you the money you worked out."

So, Avanti said with an abacus: the first year's salary 1 kg, the second year's interest 1 kg, the processing fee 1 kg, * * 3 kg, the third year's 7 kg, and the fourth year's 15 kg ... After a while, the result was worked out. Finally, I begged again and again: "Mr. Ergeneration Love, please talk to Zach well, and I am willing to pay him 19 cows!" "

Zach got the salary of 19 cows, and of course he didn't borrow three taels of silver.

Excuse me, children, what is the principal and interest of the 19 account according to the algorithm of paying the principal and interest every year?

Step 3 determine the direction

Get up in the morning and face the sun. Think with your head.

The front is east, the back is west, the left is north and the right is south;

Reach out your right hand and remember the prisons in the southeast and northwest;

Specify the orientation of the map, with north at the top and south at the bottom;

Left is west, right is east, children should distinguish.

4, the first grade math interesting topic 1, black rabbit, rabbit rabbit, white rabbit three rabbits are racing. Black cotton said, "I'm not the fastest, but I'm faster than the white rabbit." Please tell me, who runs fastest? Who runs the slowest?

() runs the fastest and () runs the slowest.

All three children are older than Fang. According to the following three sentences, please guess who is the oldest? Who is the youngest? (1) Fangfang is 3 years older than Yang Yang; (2) Yanyan is younger than Fangfang 1 year; Yan Yan is two years older than Yang Yang. () Maximum value, () Minimum value.

3. Guess the ages of the three teachers according to the following three sentences.

(1) Teacher Wang said, "I am younger than Miss Li." (2) Teacher Zhang said, "I am older than Miss Wang."

(3) Miss Li said, "I am younger than Miss Zhang." The oldest is (), and the youngest is ().

There are three classes in Guangming Kindergarten. Please guess which class has the least number of students according to the following three sentences. Which class has the largest number of students? (1) The middle class is less than the small class; (2) There are fewer middle classes than large classes; (3) There are more large classes than small classes. The number of () is the least, and the number of () is the most.

All three students are taller than each other. A said: I am taller than B; B said: I am shorter than C; Suppose I am taller than A .. () The highest, () the shortest.

6. Four children are weighed. A is heavier than B, B is lighter than C, C is heavier than A, and D is the heaviest.

The weight order of these four children is: () > () > () > ().

Xiaoqing, Xiaohong, Xiaolin and Xiao Qiang are taller than others.

Xiaoqing said I was taller than Xiaohong; Kobayashi said that Xiao Qiang is shorter than Xiaohong; Xiao Qiang said: Xiao Lin is shorter than me.

Please write down your names in descending order: (), (), (), ().

8. There are four wooden cases. The blue box is bigger than the yellow box; The blue box is smaller than the black box; The black box is smaller than the red box. Please arrange these boxes in descending order.

Box (), box (), box (), box ().

9. Zhang, Huang and Li are the surnames of three children respectively. Please guess the surnames of these three children according to the following three sentences.

(1) A is not surnamed Zhang; (2) Yellow is not C; (3) A and B are listening to a child named Li singing.

A surname (), B surname (), C surname ().

10. Teacher Zhang gave three children a red, white and blue balloon respectively. According to the following three sentences, please guess what color balloons they are assigned.

(1) Koharu said, "I didn't list the blue balloons."

(2) Xiaoyu said, "I didn't get the white balloon."

(3) Xiaohua said, "I saw Teacher Zhang give Blue Balloon and Red Balloon to the above two children." Koharu was assigned () balloons. Xiaoyu was assigned to () balloons. Xiaohua was assigned to the () balloon group. 1 1. Three children, A, B, C, race. Neither A won the first place nor C won the second place. B saw that both A and C had reached the finish line in front of him.

A won (), B won () and C won ().

12. A, B and C all won prizes in a sports meeting. Their respective events are basketball, volleyball and football. Now we know: (1)A is taller than volleyball players; (2) Football players are shorter than C and basketball players. Think about it:

A is an athlete, B is an athlete and C is an athlete.

13, dad bought three balls, two red and one yellow. Both brother and sister want it. Dad asked them to sit back to back. Dad stuffed a red one for his younger brother and a yellow one for his younger sister, hiding the rest of the balls behind him. Dad asked them to guess what color the ball in his hand was, and whoever guessed it correctly gave it to him. So, who can guess right? ( )。

14, three children, Phillips, Xiaonan and Xiaoyang, wearing red, yellow and blue hats respectively, lined up to go forward, and no one looked back. Xiao Nan can see a red hat and a yellow hat. Phillips can only see a yellow hat, but Xiao Yang can't see any hats. Do you know who will go first? Who is the second to leave? Who was the last one? What color hats are they wearing? () walking in the first place, wearing a () hat; () walking in the second place, wearing a () hat; () Walking at the end, wearing a () hat;

15. Three children lined up to play games after class. How many different arrangements can they have at most? 16, a group of children lined up to play games, from back to third, from back to fifth, how many children are playing games? 17, according to the law:

0, 1,3,6, 10,( ),( )。

18, Xiaoming lives on the fifth floor. How many stairs did Xiaoming climb from the first floor to his home?

19. The little monkey and the little rabbit went to pick peaches. The little monkey picked 15 peaches. When the little monkey gave the little rabbit three peaches, they all had the same number of peaches. Do you know how many peaches the rabbit picked?

When Xiaoming came home, he saw his father sawing a steel pipe. Xiao Ming asked his father how long it would take to saw it. His father said to Xiaoming, "It takes 10 minutes to saw a section, and a steel pipe needs to be sawed into five sections." And let Xiao Ming guess how much time it takes. Can you help?

2 1. Mom bought a 18 pencil for her sister and a 10 pencil for her brother. How many pencils did my sister give my brother? How many pencils did the two brothers have?