Five olympiad math problems for junior three students

# 么么么么么 # When solving Olympic math problems, you should always remind yourself whether the new problems you encounter can be transformed into old problems and whether the new problems can be transformed into old problems. Through the surface, you can grasp the essence of the question and turn it into a familiar question to answer. The types of transformation are conditional transformation, problem transformation, relationship transformation and graphic transformation. The following is the unfinished related information of "Five Questions of Olympiad Mathematics for Junior Three Students", hoping to help you.

1. Olympic math problems for third-grade pupils

1. Huanhuan and Lele went to buy exercise books. Huanhuan bought four and Lele bought six. Huanhuan spends less than Lele 1 yuan. How much is the exercise book? 2. Miss Wang has money from 60 yuan and just bought a football and two volleyballs. If you only buy two volleyballs, there will be 28 yuan left. How much is a football? How much is a volleyball?

There is a little black sheep in the little white sheep team. The little black sheep is the seventh in front and the fourth in the back. How many lambs are there in this team?

4. 14 Students stand in a team and do exercises. Zhang Bing is the sixth in front, which one is behind?

5. 13 chickens lined up, including a big cock. From the front, it ranks eighth. How many chickens are there in the back?

2. Third-grade primary school students' olympiad math problems

There are 1 and 13 chickens in a row, including a big cock. There are eight chickens in front of it, and how many chickens are there behind it? 2. Xiaoming 10 years old, and his mother is 38 years old. How old was Xiaoming 15' s mother?

Both Xiaoming and Xiaohong collect stamps. After Xiaoming gave Xiaohong six stamps, they both had the same number of stamps. How many more stamps does Xiaoming have than Xiaohong's?

4. Longlong buys a pineapple with 4 yuan money, and can buy 1 kg banana with the money to buy a pineapple. 1 kg of bananas can buy 4 pears. How much is each pear?

5. Xiao Min went to the store to buy stationery. She bought 1 pencil with half of the money she brought, the remaining half bought 1 ballpoint pen, and the remaining 1 yuan. How much money does Xiao Min have?

3. Olympiad math problems of third-grade primary school students

1, A, B and C are children from China, Japan and Britain respectively. A can't speak English and B can't speak Japanese, but his conversation with English children is very lively. Q: Where are the children A, B and C? Wang, Zhang and Li used to be neighbors. Later, they became doctors, teachers and soldiers. They only know that Li is older than Bing, Wang and the teacher are different in age, and the teacher is younger than Zhang. So what did they do?

There are four people A, B, C and D, only 1 failed in PE. Someone asked them who was not up to standard, and A said "B", B said "D" and C said "Not me." D said, "B is wrong." Only one of these four sentences is right, so who is not up to standard in sports?

One of the three students, Wang, Li and Zhao, did a good thing for the class when they were all away. Afterwards, the teacher asked them who did the good deed. Wang Dao: "It's Zhao." Zhao said, "Not me." Li said, "Not me." Knowing that only one of the three of them told the truth, can you judge who did the good deed?

Four students, A, B, C and D, one student won the prize in the math contest. The rest of the students asked them who was the winner, and A said, "I'm not." B said, "It's Ding." C said, "It's B." Ding said, "Not me." Only one didn't tell the truth, so who is the winner?

4. Third-grade primary school students' olympiad math problems

1, the total score of Chinese and mathematics in Jony J period 197, and the score of foreign language examination 9 1. What is the average score of three subjects in Jony J?

2. The average height of Xiaohong and Xiaoqing is 103 cm, and that of Xiaojun is 1 15 cm. What is the average height of three people?

3. A classmate reads a story book, reading 25 pages every day for the first 4 days, and then reading 40 pages every day for 6 consecutive days. How many pages does the student read on average every day?

The tree planting team will plant a batch of trees, which will be completed in 3 days. Two days ago, 1 13 trees were planted, and 55 trees were planted on the third day. How many trees does the tree planting team plant on average every day?

5. A motorcycle travels from place A to place B, traveling at a speed of 60 kilometers per hour for the first two hours and 70 kilometers per hour for the last three hours. How many kilometers per hour do you drive on average?

6. The average score of language, mathematics and nature in Ningning senior high school entrance examination is 9 1. After the announcement of English scores, his average score increased by 2 points. How many points did Ningning get in the English exam?

7. It took three math exams with an average score of 89 and four math exams with an average score of 90. What's the score of the fourth exam?

8. There are four tea picking teams. Teams A, B and C receive an average of 20kg, while teams A, B, C and D receive an average of 22kg. How many kilograms did Team Ding collect?

9. After the mid-term exam, the average score of Chinese and mathematics in Wang Ying was 92. After adding English, the average score of the three courses was 93. How many points did you get in the English exam?

10, the average weight of Mingming and Honghong is 32kg. After adding Ying Ying's weight, their average weight increased by 1 kg. How much does Ying Ying weigh?

5. Olympiad math problems for third-grade pupils

I. Calculate the following question (1)65+380+ 120.

(2)87+260+ 140

(3)370+64+ 130

(4)80+ 12 1+220

Second, calculate the following questions

( 1)739-(239+278)

(2)968-257- 143

(3)645-( 145+273)

(4)530-45+ 170

Third, calculate the following questions

( 1)234-8-8-8