Dear students, once we worked together to sow the seeds of hope. Now let's harvest rich fruits with confidence! Are you ready?
Scoring reviewer
First, let's go! Believe that smart you are the best!
The first thing we have to do is to fill in the blanks.
1, 2: 0.75 The simplest integer ratio is that its ratio is.
2、 ∶ = = ÷ 10= %
3. For a section of road, car A runs in 5 hours and car B runs in 4 hours, so the speed of car B is% faster than that of car A. ..
4. Divide the circle with the circumference of 12.56 cm into two semicircles, and the circumference of each semicircle is cm.
5. The simplest integer ratio with a ratio of 0.72 is.
6, 20 kg is 20% lighter. This meter is longer than 5 meters.
7.6 1 A work started, originally scheduled to be completed in one month. In actual construction, the task was completed on June 25th and exceeded by% on June 30th.
8. The ratio of number A to number B is 7: 3, the quotient of number B divided by number A is, and number A accounts for% of the sum of the two numbers.
9. Pi is the ratio of sum.
10, 2/3 of a equals 3/4 of b, and the simplest integer ratio of a to b is.
1 1. My mother deposited 60,000 yuan in the bank for one year with an annual interest rate of 2.25%. A year later, my mother got back 60,000 yuan from the bank.
12, 30 boys and 28 girls. The number of girls is the number of boys. The ratio of girls to boys is twice that of boys. The ratio of boys to girls is the ratio of boys to the total number, that is, the ratio of the total number to girls is.
13. The areas of two rectangles are equal. It is known that the length ratio of these two rectangles is 8: 5 and the width ratio is 8: 5.
14. The ratio of side length, perimeter and area of two squares is 3: 5.
15. Xiao Ming's father's monthly salary 1840 yuan. According to the relevant regulations on personal income tax, if the personal income tax exceeds 1200 yuan, Xiaoming's father should pay income tax of RMB yuan per month.
Scoring reviewer
Second, I will choose: think twice before you act, and be careful of the trap. I believe you can do it! (Put the serial number of the correct answer in brackets)
1, the circumference of a circle and a square is equal, and their areas are compared ()
A square is as big as B, and a circle is as big as C.
2, put 20 grams of salt into 200 grams of water, the ratio of salt and brine is ().
a、 1: 10 B、 1: 1 1 C、 10: 1 D、 1 1
3. It takes 4 hours for Xiao Zhang and 6 hours for Xiao Li to produce the same number of parts, and the efficiency ratio between Xiao Li and Xiao Zhang is ().
a 16: 14 B 2:3 C 3:2D 14: 16
4. The number of A is twice that of B, and A is more than B ()
a、50% B、 100% C、200%
5. The salt content of a brine is 10%, and the ratio of salt to water is ().
a、 1: 10 B、 1: 1 1 C、 1:9
Scoring reviewer
Third, please judge right and wrong. (The "√" in brackets is correct, and the "×" in brackets is wrong. )
1, if the number of A equals the number of B, the ratio of A to B is 6: 5. ( )
2. Put 10g salt into 10g water, and the weight of salt accounts for 10% of the weight of brine. ( )
3. If A is 20% more than B, B must be 20% less than A ... ()
The circumference of a circle is 3. 14 times the diameter. ( )
Scoring reviewer
Fourth, the calculation questions:
1, find the ratio.
60: 25 3: 1.5 hours: 45 minutes
Simplified proportion
18:: 24 tons 750 kg;
Scoring reviewer
Five, hands-on operation
1. In order to welcome the New Year, Class 6 of Shengli Primary School (1) plans to decorate the classroom with five-color disks. Li Lan has a rectangular waxed paper, 5 cm long and 3 cm wide. Can you help her draw the largest circle in the rectangle with a compass? Have a try. And calculate the circumference and area of this circle.
2. Draw all the symmetry axes in the picture below.
3. Complete the table below.
Conditional problem formula
There are 100 people in class one and 80 people in class two. What percentage is Class Two less than Class One?
How many students are there in Class Two? 100×25%
25% more than Class Two, 100 ÷ (1+25%)
How many students are there in Class Two? 100×( 1-25%)
It's 25% of the students in Class Two. How many students are there in Class Two?
Class 2 is 25% of 1 class +000× (1+25%).
In a math test, the scores of 50 students in Class A and Class B are as follows:
Class A: 2 people below 60, 4 people above 60, 6 people above 70, 80 people above 15, and 23 people above 90, of which 8 people got full marks 100 8. (More than 60 points means including 60 points and excluding 70 points)
Class B: 5 people below 60, 5 people above 60, 70 people above 10, 80 people above 19, 90 people above10/person, of which 3 people got full marks 100.
Please draw a chart, then ask at least five different types of questions and answer them according to the chart.
My question is:
Sixth, practical application. Let's experience the application of mathematics in life. Be careful, don't make mistakes. Read the questions several times before you do them.
1. A cotton field harvested 30 tons of lint last year, an increase of 5 tons over the previous year. How much has lint yield increased in this cotton field?
2. Xiaoming's home is away from school 1400 meters. He goes home by bike every day. The tire diameter of a bicycle is 70 cm. If the bike turns 80 times a minute, how long will it take Xiao Ming to get home?
3. Walter WANG deposited RMB 10000 in the bank for 3 years, with an annual interest rate of 5.22%. After paying 5% interest income tax, what is Wang Gang's principal and interest?
4. The school distributed 200 seedlings, and the teacher planted 10%. The rest are allocated to Class A, Class B and Class C according to 5: 4: 3. How many trees are classified as C?
5. A dripping faucet wastes 10 liter of water every day. How many liters of water did this faucet waste in 2007? If Qiqihar has 1000 such faucets, how many liters of water will be wasted a day?
Conclusion: Congratulations, you have finished, but don't forget to check. It would be a pity if you lose points because you are not careful enough. I hope you won't regret it in the future. Finally, try to rate yourself, rate yourself.