Stumped the math teacher s question, hurry! School is coming soon!

1. Multiple choice questions.

1. On February 3 this year, the minimum temperature in a city was , and the maximum temperature was , so the maximum temperature on this day was higher than the minimum temperature (

a、 b、 c、 d、

2. The following types of items that are not of the same kind are (

a, with b, with c, with d, with.

3. The circumference of a rectangle is 20, and the length of one side is , and the area of this rectangle is (

a、 b、 c、 d、

4. The original price of a commodity is yuan, and the price is reduced, then the current price is (

A, Yuan B, Yuan C, Yuan D, Yuan.

5. The following figure is a fan-shaped statistical chart of the annual expenditure of households A and B

According to the chart, the following judgment on the annual food expenditure cost is correct (

a. There are more households A than B B. There are more households B than household A.

c. There are two households A and B as many d, and it is impossible to determine which one has more.

2. Fill in the blanks.

1. If is the opposite of , then the value of is

2. The degree of the polynomial is the coefficient of the first term

3. If it is known that is the solution of the equation, then the value of is

4. If there is a student in a class, including a female student, the number of boys is a fraction of the class); If one of the class students does not show up, the attendance rate is

5. The co-angle of an acute angle is smaller than its complementary angle

6. If the radius of the bottom surface of a cylinder is expanded by 2 times, and the height is unchanged, then its volume is expanded by many times

7. Use the four numbers 3, 5, 6, 9 and the operations you have learned to make 24 (each number must be used, and can only be used once), please write one of the equations

3. True/False questions

1. If the reciprocal of a number is equal to itself, then the number must be 1 (

2. The odd power of a rational number is negative, and the even power is positive (

3. If , then

4. Among all the line segments connected by the points on the outside of a straight line and the points on the straight line, the perpendicular line segment is the shortest (

5. Both sides of the inequality are divided by the same non-zero number at the same time, and the direction of the inequality sign remains unchanged (

Want to be in the first year of junior high school? It is impossible to make it difficult for the teacher, the teacher just wants to see how good your math level is, and the questions you think are difficult for the teacher must be the ones you are weak or the ones you think are difficult to solve and easy to make mistakes. Don't waste the teacher's hard work.

Take a good look at your level. If you find an answer here, even if you really stump the teacher, the teacher will not be really happy.

There is indeed enough nerves, I thought of one, it is a math problem: Lao Wang is doing business, one day he bought an item and spent 18 yuan, ** price 21 yuan, a young man took a 100 yuan to buy his thing, Lao Wang had no change to find him, so he took this 100 yuan and his friend for 100 yuan change, and found 79 yuan for the young man, and then his friend took 100 yuan to find Lao Wang and said that the 100 yuan was fake, Lao Wang had no choice but to change it out of his own pocket, Q: How much money did Lao Wang lose today? Actually, this question is not difficult, but it is a bit messy.

Give him an English question.

You gave him a translation into English,

The ruler is made of 17 sides. More than 2,000 years of puzzles. Gauss was the first to succeed. Your teacher probably wouldn't.

For example, the other options are wrong, the root number 2 + (-root number 2) = 0 in a, the 0 number in c * the root number 2 = 0, and the quotient of irrational numbers and rational numbers in d must be irrational numbers.

m+1 m)=m2+1 m2+2=5, so m2+1 m2=3

So (m-1 m) 2=m 2+1 m 2-2=1, so the square root of m-1 m is plus or minus 1.

1.In the following statement, the correct one is ( b The sum of irrational numbers and rational numbers must be irrational numbers).

2.If m+1 m = root number 5, then the square root of m-1 m is bPlus or minus 1

The third question is to eat for another 9 days, counting the 18 days of the previous 1 3 eating, a total of 27 days.

You have so much content.,To the process is estimated to be incomplete here.,Only provide the answer but can write it.,I've calculated the results of the five questions.,The process can't be written here.。。。

Solution: From the question, we know that no matter when, the total deposit of A and B remains unchanged.

Therefore, according to the deposit ratio of A and B is 5:2, A's deposit is 3000 * 5 7 yuan (that is, 4 5 A), and then the equation 3000 * 5 7 = 4 5 A is obtained.

A = 18750 7 yuan, so B = 3000 - A = 2250 7 yuan.

The deposit ratio of A and B is 5:2

Now A is 3000 5 (5+2) = 15000 7 yuan, which is reduced by 1 5.

Therefore, it turns out that A 15000 7 (1-1 5) = 18750 7 is about equal to 3000-18750 7 = 2250 7 is about equal to Answer: It turns out that A has a yuan, and B has a yuan.

Backwards are solved.

Before C buys: (1+1)*2=4, he buys half and another for 3;

Before B buys: (4+1)*2=10, he buys half and another for 6;

Before A buys: (10+1)*2=22, he buys half and another for 12.

It turned out to be 22 in total.

22 with backward method.

There is one broken egg left, which means that half of what C bought plus one is a total of three, and because there is still one broken egg, so adding one more equals four

4 plus 1 is 5, that is, B buys the remaining half of him, and multiplies it by 2, and adds 1, that is, A buys the remaining half of him, and it has to be multiplied by 2 again, and it is 22, I hope it can help you, hehe.

C buys 3 of them, counting the remaining broken ones, and buys the first 4 pieces.

B buys 6 and counts the remaining 4 to buy the first 10.

A buys 12, counting the remaining 10, 22.

Let's say there are x eggs in the original.

Customer A buys x 2 + 1 (pcs), then x-x 2-1 = x 2-1 (pcs) remains; If the customer buys x 4 + 1 2 (pcs), then x 2-1-x 4-1 2=x 4-3 2 (pcs) is left; C buys x 8 + 1 4 (pcs), then x 4-3 2-x 8-1 4=x 8-7 4 (pcs), x 8-7 4=1 solution: x=22

2(2(2(1+1)+1)+1)=22

Please forgive me for not being able to make the multiplier number.

Solution: 1, (530 + 10-450) 450 100% = 20% 2, the number of shares invested in the last period of Uncle Zhang is 16, then the number of shares invested in each period is:

1 share in the first phase; 2 shares in the second phase; 4 shares in the third phase and 8 shares in the fourth phase; The total loss of the fifth period of 16 shares in the fifth period is 16 (450-10), and the total loss of the first four periods is (1+2+4+8) (530+10-450).

A: His return on investment is 20%, and Uncle Zhang lost 5,690 yuan in this MLM activity.

∠ade=(180°-∠a)-∠aed

acb==(180°-∠a)-∠abc

Since AED+ B=180°

∠ade=∠b-∠a

acb=∠b-∠a

The two corners are equal on one side, congruent triangle.

Come aed + b = 180°

Since bac= ead

bai∠bac=∠ead=60°

bac is equilateral triple du

The angular EAD is an equilateral triangle.

BC = ED equilateral triangle 60° at each angle

This kind of question is often tested in exams, and many of them are.

DAO Proof I hope you can get a good score tomorrow.

Point C is the vertical line of AB. Hang the dot to come.

for f. Then take a little g on ab so that baicg=cb. Because aed+ b=180° and it is easy to prove that du b= cgf.

So zhi daoaed= agc is easy to prove aed congruent agc is easy to prove bc=cg so bc=de . LZ can try it for yourself.

Because bai

aed+ dub=180° zhib+ bac+ c=180, so aed= bac+ c

And because dao bac= ead

So aed= ead+ c so c= d triangle equal version.

The three sides are also equal.