Find 90 fractions, four mixed operations, 15 application problems, and 15 geometry problems about c

Take a little E on the bottom edge of the trapezoidal ABCD to make the circumferences of ABE, BCE, and CDE equal, and verify: BC=AD 2.

Proof: Extend AD, BC to F, G, G, so that CG=BE, CD=DF, connect GF, CF.

According to the title: BE+BC+EC=CD+DE+ECCG+BC+EC= DF+DE+EC

cg+bc= df+de

i.e.: bg=ef

Ad BC again

BEFG is a parallelogram.

be=gf gcf= cfd be gf and cg=be

cg=gfgcf=∠gfc

cd=df

dcf=∠cfd

and gcf= cfd

gfc=∠dcf

cd gf in turn be gf

cd‖gfbe‖cd

The bedc is a parallelogram.

Similarly, AECB is a parallelogram.

bc=ed、bc=ae

bc=(ae+ed)/2

i.e. bc=AD 2

It is known that ab is the diameter of the circle O, Cd is Xuan, CE is perpendicular to Cd to AB to E, and DF is perpendicular to Cd to AB to F to verify AE=BF

Over o as og perpendicular cd to g, so from the perpendicular diameter theorem cg=gd because ce is perpendicular to cd to ab to e, df perpendicular to cd to ab to f, so ce og df

So OG is the median line of the trapezoidal ECDF.

So oe=of

So ae=bf

You don't need to look it up online.

You can buy a workbook by yourself, and there are a lot of workbooks for practicing problems.

(1) The fruit store transports a total of 390 kilograms of apples, bananas, and pears in a day, the weight of apples is 1 5 times that of pears, and the weight of bananas is 3 4 times that of pears.

2) A tank of water, use 1 2 and 5 buckets, there is 30% left, how many buckets of water are in this tank?

3) There is a cube of timber with a fast edge length of 20 cm, planed into a cylinder with the largest bottom diameter, what is the volume of planed wood?

4) A steel pipe is 10 meters long, the first time it was cut off 7 10, the second time it was cut off the remaining 1 3, how many meters are left?

5) Two teams assemble radios, Group A assembles 50 units per day, and completes 10% of the total task on the first day, at this time Group B starts to assemble, assembles 40 units per day, how many days does Group A do when completing this batch of tasks?

6) After building a highway and completing the full length of 2 3, kilometers from the midpoint, how many kilometers is the total length of this road?

7) The master and apprentice made a batch of parts together, and the apprentice made 2 7 of the total number, 21 less than the master, how many parts are in this batch?

8) Two teams build a road, team A repairs the full length of 1 5 every day, and team B repairs it alone for 7 5 days. If the two teams practice together for 2 days, and the rest is practiced by team B alone, how many days will it take to complete?

9) There is a batch of fertilizer in the warehouse, the first time the total number is taken out 2 5, the second time the total number is taken out 1 3 less 12 bags, at this time there are 24 bags left in the warehouse, how many bags are taken out in total in two times?

10) The front wheel rotates 40 times more than the rear wheel in a distance of 720 meters, if the circumference of the rear wheel is 2 meters, find the circumference of the front wheel.

11) The number A is 1 2 times the average of the three numbers of A, B and C. If the sum of B and C is 99, what is the number A?

12) There is a project with 800 workers and is limited to 100 days. Unexpectedly, from the start of construction, after 35 days of work due to an accident to stop, after 25 days of shutdown, continue to work, if to complete within the time limit, how many more workers should be added?

13) The fruit store buys several kilograms of apples for 2 yuan and 1 5 kilograms, and sells them for 4 yuan and 2 5 kilograms. If the store wants to make a profit of 100 yuan, how many kilograms of fruit does this fruit store have to sell?

14) The walking speed of A, B and C is 30 meters, 40 meters and 50 meters per minute, respectively. A and B are in place a, and C is in place b. A B and C are walking in the same direction at the same time, and C meets B 10 minutes after meeting A.

15) It takes 10 minutes for A to go from the East Village to the West Village, and B needs to walk 15 minutes from the West Village to the East Village, and the two people set off at the same time to walk in the opposite direction, and when they meet, they are 150 meters away from the midpoint, seeking the distance between the two villages.

Ten fill-in-the-blank questions, five application questions, okay?

Primary 6 Mathematics Exam Questions.

Class Name Score.

1. Fill in the blanks. (10 points).

The reciprocal of 1 is 5.

2. ( Also known as the ratio of two numbers.

3. The radius of a semicircle is 1 decimeter, and its circumference is ( ) and the area is ( ).

4. A number greater than 0 is multiplied by a true fraction, and the product ratio is multiplied by ( ).

5. A number greater than 0 is divided by a true fraction, and the quotient is divided by the dividend ( ).

Hours = ( ) minutes, 1 ton = ( ) kilograms.

7. If the number A is equal to the number B, then the simplest ratio of the number A to the number B is ( ).

8. Divide by the product multiplied by its reciprocal, the quotient is ( ).

9. From city A to city B, A has to travel for 5 hours, B has to travel for 4 hours, and the speed of A is ( ).

10. The sum of all the edges of a cube is 60 centimeters, and its volume is ( ) cubic centimeters.

1. Repair a canal, 1 4 in the first week, and 2 kilometers in the second week. How many kilometers is this canal long?

2. A certain village produced 480,000 kilograms of grain last year, an increase of 160,000 kilograms over the previous year, an increase of several percent?

3. Use a square paper with a side length of 40 cm to cut out the largest circle, what is the area of the remaining part?

4. The transport team delivered a batch of building materials to the construction site, and on the first day it was 15 tons less than the total 30, on the second day it was 20 tons more than the total 40, and on the third day it was the last 49 tons. How many tons of construction materials are there?

5. A project, A alone to do 15 days to complete, B to do alone to 20 days to complete, two people to do a number of days together, A has another task to transfer, the rest of the project B took 6 days to complete, how many days did the two teams do together?

6. There are 960 employees in a factory, and the number of male workers is 30 more than the number of female workers.

15 points, five points?! The question has not yet been ......Go to pieces.

???You can copy 11 books from your previous grade, that's a lot.

1. Text questions.

1) How much does 4 get by dividing it by the sum of 2 and 1 2 and subtracting 1 7?

4 (2 and 1 2+.)

2) What is the quotient of 4 divided by 2 and 1 2, plus the product with 1 7, and what is the sum?

What is the quotient of 4 (3) What is the quotient of the sum of 4 and 2 and 1 2, except for the difference with 1 7?

4+(4)4 divided by the quotient of 2 and 1 2, added and multiplied by 1 7, what is the product?

4 (5)4 divided by the sum of the quotient of 2 and 1 2, and then multiplied by 1 7, what is the product?

4 II. Practical Questions.

1) The TV factory produced 1400 TVs in January, and produced 1 7 more TVs in January than in January, how many TVs were produced in February?

In February, 1,600 TVs were produced.

2) The TV factory produced 1400 TVs in January, and produced 1 7 fewer TVs in February than in January, how many TVs were produced in February?

In February, 1,200 TVs were produced.

3) The TV factory produced 1400 TVs in January, and produced 1 7 more TVs in January than in February, how many TVs were produced in February?

In February, 1,200 TVs were produced.

4) The TV factory produced 1400 TVs in January, and produced 1 7 fewer TVs in February than in February, how many TVs were produced in February?

In February, 1,600 TVs were produced.

5) The TV factory produced 1,400 TVs in January, and produced 1 7 more TVs in January than in January in February.

In January and February, a total of 3,000 TVs were produced.

1) How much does 4 get by dividing it by the sum of 2 and 1 2 and subtracting 1 7?

Press the Ha calculator, simply dead.

Your teacher is mentally ill!

Answer: 1. Find the library.

2. Input: Zen Jianyan Primary School Sixth Grade Oral Arithmetic Bright Destruction Questions, Fractions, Four Mixed Operations, Application Questions, Practice Questions.

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