High Score Reward A primary school math problem 20

Calculate their basic score is 93 points, because it is three subjects to increase by 2 points, a total of 2 times 3 equals 6 points, 93 is the basic score, plus 6 points is 99 points (of course, there is a little problem with your question, you already know that it is mathematics, why do you still ask for mathematics?) I did it with my own understanding, I don't know if it's right or not).

If it is only required to improve mathematically, then the three subjects should be summarized in total 3 2 = 6, so 93 + 6 = 99, so math should be 99 points.

93*2 calculates the total score of the three subjects, and 93+2 calculates the average score after increasing by 2 points. Mathematics = 95 points.

With an average score of 93 in English and Chinese, an average score of 95 in 3 subjects should be higher than the other two (3 times 2) points.

So 93 + (2 times 3) = 99

So math should be 99 points.

First, calculate the total score of the first three lessons (93 3 2) before 2 points, and then subtract the total score of the two subjects in English to get the score of mathematics (93 2).

The final formula is as follows:

93*3+2-93*2=95 (points).

Answer: 95 in Mathematics

Can it satisfy you?

Also ask a question, can the average score of the three subjects be defaulted to the average score of the two subjects of 93?

1.Solution: Set the land area x hectares, and the water surface area 3x hectares x + 3x = 290

4x=290

x = 3x = A: land area hectares, water surface hectares.

2.The volume of the overflowing water, equal to the volume of the cone, is:

1 3 cubic decimeters.

Water surface drop: decimeters.

1.Let the land area be x water area = 3x x + 3x = 290 x = land area is hectares and the water area is hectares.

2 Box volume = 25 Cone = 1 * 1 * Drop =

(1) The land area is x hectares and the water surface area is 3 hectares.

3x+x=290

x = hectares. 3x = hectares.

The land area is hectares, and the water surface area is hectares.

2) The volume of the conical object = 1 3 1 If , the volume of the conical object =

1.Let the land area s, then the water surface area is 3s

s+3s=290

4s=290

s = hectares. 3s = hectares.

A: The land area is hectares, and the water surface area is hectares.

2.Since the container is already filled with water, after the cone is immersed, water equal to the volume of the cone overflows. And when the cone is taken out again, the volume of water missing from the container is the volume of the cone.

Cone volume v=(1 3) cubic decimeters.

Such a volume is equivalent to water with a height of h in a container of 5 dm and 2 dm in length and width, so 5 2 h =

H = is the drop in the water surface.

1 If the land area is xha, then the water surface area is 3xha3x+x=290

4x=290

x=3x=3×

A: The land area is hectares, and the water surface area is hectares.

2 solution h=1

A: Dropped by 25dm.

Question 1: Let the land area be x

3x+x=290

In this way, the area of the land is calculated, and then the total area is subtracted from the land area is the area of waterQuestion 2: first calculate the volume of this box and the cone, and then subtract the volume of the cone from the volume of the cuboid to get the volume of water left after taking out the cone, and finally let the height of the remaining water be x, and 5 times 2 times x equals the volume of the remaining water.

Finally, subtract the x value to get the water to a higher drop.

1.If the land area is x hectares, then the water surface area is 3x hectares x + 3x = 290

x = The land area and water surface area of the Summer Palace are hectares and hectares, respectively.

2.Water surface drop = 1 1 dm.

1.Solution: If the land area is x hectares, then the water surface area is 3x hectares.

x+3x=290

4x=290

x=3x=2.The volume of the cone: 1 3 cubic decimeters).

Height of descent:

1. Set the land area to be x hectares.

The water surface area is 3x hectares.

x+3x=290

4x=290

x=3x=3*ha.

A: The land area is hectares and the water surface area is hectares.

2. When it is completely immersed, the increased volume is the volume of the conical object, so the increased volume v=1 3 *r*r*h=

The height at which the water surface descends is h=v s=

If the water surface area is x, the land area is 290-x

3x=290-x, the solution is x=, that is, the water surface area is the land area, and the volume of the cone is 1 3* *1 2*

The volume of the outgoing water is equal to the volume of the conical object, and the water surface drops x5*2*x=1 2

x=π/20

1] If the land area of the Summer Palace is x, then the water surface area of the Summer Palace is 3x, and x+3x=290 is obtained according to the equation of the problem

4x=290

x = hectares and hectares of water surface area of the Summer Palace, respectively.

2] The volume of the cone: cubic decimeters.

Height of descent: decimeters.

1. To find the survival rate of planting trees is to find (the number of surviving trees) is (the total number of trees planted) is to find the percentage of wheat flour yield is to find (the amount of flour) is (the total amount of wheat).

2. The students planted 100 trees, but 120 were actually planted. What percentage of the original plan was actually planted? What other math problems can you ask? Please answer your questions.

Question: What percentage of trees are actually planted over the original plan?

3. A machine tool factory originally planned to produce 200 machine tools in the third quarter, but actually produced 230 machines. What percentage of the actual number of machines produced is equivalent to the original plan?

230/200x100%=115%

4. The price of a household appliance was raised by 10% first, and then the price was reduced by 10%. The current ** is a few percent of the original.

1+10%)x(1-10%)=99%

1. The number of survivals, the number of plantings, the weight of flour, the weight of wheat %, how many percent of the actual tree planting exceeds the plan? （120-100）÷100×100%=20%

4、(1+10%)x(1-10%)=99%

1. The number of survivals, the number of plantings, and the flour of wheat.

100x100%=120%

200x100%=115%

Question 1: Set the blended oil as x yuan.

x+8x=27

This gives 9x=27, x=3

Question 2: Xiao Ming's right, because 195-4*45=195-180=15 people, there are still 15 people left.

Xiaoliang is also right, because if the remaining 15 people are evenly distributed, there will be 3 people left, so one of the classes will be one less person, and the result is 149 people in 3 classes and 148 people in the last class.

Original: house price: 150 * 1800 + 12 * 600 = 277,200 yuan.

Down payment: 277,200 * 30% = 83,160 yuan.

Loan: 277,200-83,160 = 194,040 yuan.

Interest: 194040*10*yuan.

Total: 67914 + 277200 = 345114 yuan.

After the price increase: house price: 150 * 1800 * 160% + 12 * 600 * 150% = 442,800 yuan.

Loan: 441,800-83,160 = 359,640 yuan.

Interest: 359,640*15*yuan.

Total: 442800+ yuan.

and so on during this period of time to spend more dollars , of course set up without taking into account other inflation.

Wait for me, I'll go get some glasses first.

I'm sorry what simple interest is.