The first grade of primary school, the second volume, an Olympic math problem
1. Children line up to play games. There are 8 people in front of Ding Ding and 6 people behind him. This team has (? ) A child. 2. Small animals are waiting in line. The puppy number from the left is the sixth, and the puppy number from the right is 10. There are () animals in line.
3, a bookcase * * * three layers, Chinese book under the math book, math book under the story book, () book above, (? ) At the bottom.
4. There are many flowers in the park, including 18 tulips, of which 8 have blossomed and () have not.
5. There are 16 ducks, 8 ducks have swam away, and there is one ().
6. There are *** 14 pears and apples, including 8 apples and 8 pears. I ate three apples, and (? ) one.
7.A * * * has 15 fish, and there are 7 fish on the left and (? ) article.
8. A teacher played hide-and-seek with 1 1 classmates, and hid five, and (? ) People don't hide well.
9. There are 18 female students waiting in line. Now there is a boy between every two girls, and the boy has (? ) people.
10, the pediatric ward doctors want to see Patient No.28, and they have seen at most (? ) patients.
1 1, a number, which is higher than one-digit 5 and ten-digit 7 1. This number is (? )。
The two digits of 12 are (), and the smallest digit is (? )。
13, the number between 78 and 80 is (), and the integer closer to 87 is (? )。
14, 97 jumps in winter and winter won the first place, 94 jumps in Ding Ding won the third place, red got the second place, and red probably jumped (? ) come down.
15, find a regular number: 3, 5, 7, 9, (? )、()、(? )
The second primary school, grade one, book two, Olympic Mathematics.
1, seven short ropes are woven into a long rope, and one * * * hits (? ) a knot. ? 2. There are 12 carrots in the basket. The little gray rabbit ate half, the little white rabbit ate half, and the rest (? ) one. ?
3.3 pears and (? ) A strawberry. ?
4, with 1, 2, 3 three numbers can form (? ) Three different numbers. ?
5, there are two numbers, their sum is 9, the difference is 1, and these two numbers are (? ) and (? )?
6. Three children play chess. Each of them has to play a game with the other two. They want to play (? ) plates. ?
7. The bus runs every 15 minutes. My brother wanted to take the 9 o'clock train at 10, but it was already 9: 20 when he arrived at the station, so he had to wait. It will take a few minutes to catch the next bus. ?
8. 15 children lined up to count off, even children went to play table tennis, and the rest (? ) people. ?
9. A sika deer jumps forward from the starting point? 5 meters, then jump back 4 meters, jump forward 7 meters, and jump back 10 meters; Then stop and have a rest. Do you know whether sika deer stopped before or after the starting point? How many meters from the starting point? ?
10. After my brother gave my brother two pencils, there were five left. At this time, both of them have the same number of copper pens, but my brother already has pencils (? ) branch. ?
1 1, Linlin, Honghong and Fangfang buy candy. Linlin bought 7 capsules, Honghong bought 8 capsules, but Fangfang didn't. The three children wanted to share it equally, and Fangfang paid 1 yuan, of which Linlin (? ) Angle, give red (? )。 ?
12, three people eat three steamed buns and eat them in three minutes; According to this calculation, nine people eat nine steamed buns and need (? ) Eat in minutes? ?
13, a long-distance race is being held on the circular runway. Seven people run in front of each athlete and seven people run behind each athlete. There is a * * * (on the runway? ) An athlete? ?
14. Put 16 chickens into five cages respectively, so that the number of chickens in each cage is different. How to put it? Please fill in the number of chickens in each cage in the five boxes below. ?
15, Honghong is 8 years old today, and her sister 13 years old. 10 years later, her sister is older than Honghong (? ) years old. ?
The third elementary school, the first grade, the next book, Olympiad Mathematics.
1. Three children made three earphones in three days, and one child made one earphone in () days. 2. 12 cars move forward one by one. From the front, the white car is the eighth, and from the back, it is the first (? ) car.
There are 500 books in the library, 80 books were lent out for the first time, 200 books were lent out for the second time and 40 books were returned. At this time, there are new books in the library ().
4, each flight of stairs takes half a minute, so 1 to the fifth floor * * * with (? ) minutes.
5. Mom bought 14 crabs, two died after 1 hour, and (? ) A crab.
6. On Children's Day, the lanterns on the roadside are arranged in four colors: yellow, red, blue and green. What is the forty-ninth lamp? ) color.
7. When the little black bear climbs to the top of a tree 8 meters high, he can only climb 2 meters at a time and slide down 1 meter. Then, it climbed up (? ) climb to the top of the tree.
8. It takes 3 minutes for one person to sing, and 10 takes () minutes for one person to sing a song at the same time.
9. There are 10 people in the car. After five people get off, four people get on. Now there is (? ) people.
10, there are 16 children playing games, then three children join in and six children go home. Now there is (? ) The children are playing.
1 1, mother cat caught some fish, Xiaohua Mall ate a fish, gave the remaining half to the little white cat, and the kitten ate another fish and gave the remaining half to the little black cat. At this time, there are four fish in Xiaohua Mall. Please calculate, mother cat caught a * * * (? ) fish.
12, there is a coat 50 meters, sew a button every 10 meter, sew a collar, sew a bottom, sew (? ) button.
13, a piece of wood, to saw it into five sections, if it takes 2 minutes to saw a place, use * * * (? ) minutes.
Class 14, 10 1 54 good deeds in the first week, 8 more in the second week, 5 more in the third week, and 3 Mondays * * * (? ) pieces.
15, there was a clock, which struck several times for half an hour. 1 o'clock to 5 o'clock, this clock strikes * * * ().