Sixth grade math exercises and answers.

Typical question bank for averaging

★ 1. Li Shifu worked for 3 hours in the morning, * * * processed 246 parts, and worked for 4 hours in the afternoon, * * * processed 342 parts. How many parts are processed per hour on average in Li Shifu today?

★2. Bicycle repair department repaired bicycles 165 in the first half of April and bicycles 195 in the second half of April. How many bicycles are repaired on average every day in April?

★★★★ 3. A car transports fertilizer to the commune, with 5 trips in the morning, 30.7 tons in the afternoon and 4 trips in the afternoon, 6.5 tons less than in the morning. How many tons of fertilizer are transported on average each time?

★★★★ 4. A bookstore 1 month sold 65,438+0235 books, 65,438+0009 books in February, 65,438+0340 books in March, 208 fewer books in April than in March, and 65,438+fewer books from May to the end of the year than in the previous four months. How many books are sold on average every month this year?

★★★★ 5. Qianjin Chemical Fertilizer Plant produced an average of 9,800 tons of chemical fertilizer per month in the first half of last year and18,700 tons of chemical fertilizer per month in the second half of last year. This year, it is planned to increase production by10.5 million tons compared with last year. How many tons of chemical fertilizer do you plan to produce every month this year?

A train traveled 260 kilometers in the first five hours and 9 kilometers per hour in the last seven hours. How many kilometers does this train travel per hour on average?

★★★★ 7. A farm has 35 people hoeing in a week. Mow 70.3 mu in the first three days and 120.8 mu in the last four days. How many acres does each person hoe every day?

★★★★ 8. A ship sailed from Port A to Port B and arrived due to the smooth sailing of 10 hour. When it returned from port B to port A, it sailed against the current, which was five hours longer than when it left. The distance between Port A and Port B is 250 kilometers. Find the average speed of the ship back and forth?

9. The average score of Li Ming's math Chinese foreign language test is 97 and the average score of math Chinese is 96. How many points did he get in the foreign language exam?

★★★★10. A chemical fertilizer plant produced 4006 tons of chemical fertilizer in April and 5000 tons of chemical fertilizer in May. If the average monthly output in the second quarter is 4,800 tons, how many tons of chemical fertilizer will be produced in June at least?

★★★★ 1 1. There are two wheat fields, the first one is 3 mu and the second one is 5 mu, with an average yield of 370 kg per mu. The average yield of the first piece is 320 kilograms per mu, and the average yield of the second piece is how many kilograms per mu?

★★★★ ★12. A class in Grade 5 of a school has a math exam. There are 9 people in the first group, with an average score of 90, the second group 10 with an average score of 89.5, the third group 10 with an average score of 92.2, and the fourth group with 9 people with an average score of 774. What is the average score of the students in this class?

average number

1.(260+342)÷(3+4)=84 (pieces)

2. (165+195) ÷ 30 =12 (vehicle)

3.(30.72-6.5)÷(5+4)=6. 1 (ton)

4.[( 1235+ 1009+ 1340+ 1340-208)+( 1235+ 1009+ 1340+65440)

5. (9800× 6+18700× 6+15000) ÷12 =15500 (ton)

6.260+(260 ÷ 5+9) 7 ÷ (5+7) = 57.25km。

7. (70.3+120.8) ÷ (3+4) ÷ 35 = 0.78 (mu)

8.250×2( 10×2+5)= 20 (km/h)

9.97×3-96×2=99

10.4800× 3-4006-5000 = 5394 (ton)

11.[370× (3+5)-320× 3] ÷ 5 = 400 (kg)