1, 8 14? 19, you can take 19 as () to measure the quotient.
2. The number of A is 12 times that of B. (1) If the number B is 24, then the number A is (). ② If the number A is 60, then the number B is ().
3、800? 25=(800? 4)? (25? 4) This is based on ().
There are 6 15 flowers in the flower shop. If you make a flower basket with 28 flowers at a time, you can make () flower baskets, and there are () flowers left.
5. If △+□= 18, □? 5=20, then △ = (), □ = ().
Second, judge.
1, when the division of divisor is two digits, it will be successful as long as you try the quotient once. ( )
2. When three digits are divided by two digits, the quotient must be two digits. ( )
The length of a light is 3000 meters. ( )
4. The quotient of dividend and divisor cannot be changed unless it is expanded by 10 times, 100 times and 1000 times. ( )
Third, calculation.
1, a number written directly.
4500? 500= 840? 40= 93? 200=
35? 35? 64? 0= 1400? 20= 180? 20=
240? 60= 34? (5-5)= 350? 70=
2. Estimate first, then calculate.
858? 39 125? 24 9 18? 27
503? 2 1 448? 89 184? 46
3. Who is faster?
3500? 500 18000? 2000 7300? 25? 4 800? 25 Transferred from Elf Children Information Station (060s.com)
4. Column calculation.
What number is multiplied by 43 to get 559?
What is 32 times that of 2832?
③32 and 13. What is the quotient of the sum divided by 405?
Fourth, fill in the form.
1, by speed? Time = distance, complete the table below.
Distance 300m180m
Time 6: 25 seconds
Speed 120km/h 15m/min.
2. According to the unit price? Quantity = total price, complete the following table.
Basketball, football and volleyball
Unit price/yuan 68 45
Quantity/piece 1 1 12
Total price /638, 540 yuan RMB.
Fifth, the application problem.
1. Li Shifu processes 24 parts per hour. According to this calculation, how many hours does it take to process 360 parts?
The pyramids of Egypt are one of the seven wonders of the world. It's magnificent. It is estimated that the height of the pyramid tower is106.5m, and the area around the bottom of the pyramid is1000m. Xiaoyan can walk in 3 minutes 155 meters. According to this calculation, can she walk the bottom of the pyramid in 20 minutes?
Project Name Unit Price (Yuan)
Recorder 278
slide projector
Electric fan 195
3.① If the school spent 1000 yuan on four electric fans, how much should it get back?
If the school plans to buy 10 tape recorders and 5 electric fans, do you think 4000 yuan is enough?
③ Jianguo Road Primary School added 1 1 slide projector and 5 electric fans this year, which cost 7245 yuan. Can you calculate the unit price of the slide projector?
The following table shows the time and test records of Xiaoqing, Xiaohua, Xiao Min and Xiao Fang practicing typing every day.
Xiaoqing Xiaohua Xiao Min Xiao Fang
Daily practice time/minute at ordinary times 20 30 35 60
Time/minute12191813
Test word /384 63 1 846 728
Recording speed (pieces/minute)
Please calculate everyone's typing speed according to the test records. (Typing speed = total typing volume? Typing time)
② What other math questions can you ask?
Analyze the data in the table. What did you find?