Introduction to profit and loss problem, also known as the problem of insufficient income, is one of the typical application problems. Profit and loss problem distributes a certain amount of goods to a certain number of people equally. Because the goods and the number of people are unknown, we only know that one of the two distributions is surplus and the other is deficit. Either there is a surplus twice, or there is a deficit twice. Find the total number of goods and personnel involved in the distribution. This kind of problem is called profit and loss problem. The following is the related information of "profit and loss problem Application Problem of Primary School Students' Olympic Mathematics", hoping to help you.

1. profit and loss problem application problem of Olympic mathematics for primary school students.

1, Class 1, Grade 3, Young Pioneers take part in the school brick moving work. If each person moves 4 bricks, there are 17 bricks left; If each person moves 7 bricks, there will be 10 bricks less. How many young pioneers are there in this class? How many bricks are there to move? Solution: The total difference is 17+ 10=27 (block);

The difference of distribution is 7-4=3 (block);

So there are young pioneers 27÷3=9 (people)

* * * Brick: 4×9+ 17=53 (block).

A: There are 9 Young Pioneers in this class, and there are 53 bricks to be moved.

2. The school allocates dormitories for new students. If there are 3 people living in each room, there are 22 more people; If there are five more people in each room, 1 room will be empty. How many rooms are there in the dormitory? How many freshmen are there

Solution: the first profit is 22 people, and the second room is added, and the loss is 3+5=8 (people);

The total difference is 22+8=30 (person);

There is a difference of five people between the two assignments.

So the dormitory has 30÷5=6 (rooms).

Freshman * * * has 3×6+22=40 (person).

A: There are 6 dormitories with 40 freshmen.

Mother bought a basket of oranges and distributed them to the whole family. If two of them are divided into four and the rest are divided into two, there will be four more. If one of them is divided into six parts and the others are divided into four parts, 12 is missing. How many oranges did mom buy? How many people are there in the family?

Solution: two of them are divided into four, the rest are divided into two, and the extra four are "converted" into two for each family.

Excess 4+2× (4-2) = 8;

One person is divided into six and the others into four, so there is a lack of 12 ",which translates as" everyone in the family is divided into four,

Missing12-(6-4) =10;

According to profit and loss problem's basic formula, the number of family members is (8+ 10)÷(4-2)=9 (persons).

Buy oranges 2×9+8=26 (pieces)

2. Pupils profit and loss problem Olympic Mathematics Application Problem

1. The school has a batch of saplings, which are given to several young pioneers for planting. Divide it down again and again, one at a time, and the remaining 12 trees are not enough; If we bring eight more seedlings, then each young pioneer can plant 10 trees. How many young pioneers went to plant trees? How many primitive saplings are there? Xiaoming bought five pencils and eight erasers for one yuan. If he bought/kloc-0 pencils, he got less than 2 points. If he buys an eraser, he will get an extra 1 point. How much is each pencil? How much is each eraser?

3. Class 4 (1) students planted trees, each planted 1 tree, and there were 20 trees left, each planted 2 trees, with a difference of 30 trees. How many students are there? How many seedlings are there?

4. Learn from Lei Feng's group to move bricks for the school. If everyone moves 18, there are 2 pieces left; If everyone moves 20 yuan, a classmate will have no bricks to move. Q * * * How many bricks are there?

The teacher distributed some apples to the children. If everyone gets one, there are eight apples left; If everyone gets two, there are still two apples missing. How many children are there in a * *?

3. Pupils profit and loss problem Olympic Mathematics Application Problem

1. A number divided by 4 is greater than 3, divided by 5 is less than 2, and divided by 7 is less than 4. What is the smallest number? 2. What is the smallest number when a number is divided by 5 and greater than 2, divided by 6 and less than 2, and divided by 7 and less than 3?

3. On average, 5 cases are packed in 150 to 200 parts. If there are more 1, it will be changed to 6 cases and 4 more. If it is changed to 7 cases, there will be 5 more at last. How many parts are there in this batch?

4. There are less than 60 apples in a basket, and they are distributed to 5 children on average, which is more1; Give an average of six children and three more. If you give it to seven people on average, there will be two more in the end. A * * * How many?

5. There is a pile of balls, count to three, and finally there are two left; Five numbers of five, and finally there are three left; Seven numbers of seven, and finally there are two left. How many balls are there?

6. What is the smallest number that a number is divisible by 5+2, 6+3 and 7+4?

7. A string of colored lights, seven numbers of seven, and finally 1 more; Count to nine, the last night; Five numbers of five are just enough. How many colored lights are there at least on this rope?

8. What is the smallest number when a number is divided by 7 plus 2, by 10 minus 2 and by 165438 plus 0 plus 3?

9. Odd numbers are divided by 288 and 2 14 respectively, and the remainder is 29. What's this number?

10. An integer, divided by 300,262,205 respectively, with the same remainder. What should this number be?

4. Primary school students' profit and loss problem Olympiad application questions

1. Distribute some sweets to the children in the kindergarten class. If each child is divided into three parts, it will be more 17. Each person is divided into 5 capsules, lacking 13 capsules. How many children are there? How many sweets are there? 2. Give some little monkeys a basket of peaches. Each monkey was given five peaches, and the last one was16; Each monkey is divided into seven parts, 12 peaches are not enough. How many little monkeys are there? How many peaches are there?

The school recently bought a batch of electric fans and distributed them to junior middle school classes. If two classes are equipped with 4 sets per class, the rest can only be equipped with 2 sets per class; If a class is divided into 6 sets, the rest of each class is divided into 4 sets, which is still short of 12 sets. * * * How many electric fans did you buy? How many classes are there?

4. Students go boating in the park, and each boat will take four people, so there will be three fewer boats; There are six people in each boat, and two people can't sit on it. How many students are there? How many ships are there?

The factory will build a new dormitory, with 4 people living in each room and 34 people without beds. If there are six people in each room, there will be five more rooms. * * * How many workers need to be accommodated?

5. Primary school students' profit and loss problem Olympiad application questions

1, the kindergarten teacher gave each child candy, and each child gave 5 candy, so there were 22 more candy; If each child is divided into seven pieces of sugar, there will be less 18 pieces of sugar. How many children and some sweets are there? Answer: (22+ 18)÷(7-5)

=40÷2

=20 (person);

5×20+22

= 100+22

= 122 (block).

A: There are 20 children, 122 candy.

2. School spring outing, rent a few boats for students to row, each boat has 3 people and 20 people have no boats; If there are five people on each boat, it is just arranged. * * How many students are there? * * * How many boats did you rent?

Answer: Solution: 20(5-3)

=20÷2

= 10 (strips);

3× 10+20

=30+20

=50 (person).

A: * * * There are 50 students, and * * * rented a boat at 10.