6th grade math, trouble getting a step by step equation, thank you

Li Ming's mother should pay personal income tax: (1800-1600) * 5% = 10 yuan.

The personal income tax payable by Li Ming's father: 500*5%+(2500-1600-500)*10%=25+40=65 yuan.

Please think about solving the problem, don't keep thinking about it, it will hurt you!! Sin, sin!!

Mother: Tax payable: 1800-1600 = 200 (yuan) Tax: 200 5% = 10 (yuan).

Dad: Tax payable: 2500-1600 = 900 (yuan) Tax within 500: 500 5% = 25 (yuan).

Tax over 500: (900-500) 10% = 40 (yuan) total: 25 + 40 = 65 (yuan).

Answer: Mom should pay personal income tax of 10 yuan, and father should pay personal income tax of 65 yuan.

Mom pays taxes: 1800-1600 = 200 (yuan) 200x5% = 10 (yuan).

Dad pays taxes: 2500-1600 = 900 (yuan) 900 x 10% = 90 yuan.

Answer: Mom should pay personal income tax of 10 yuan, and father should pay personal income tax of 90 yuan.

The first question says that the actual investment is 4.2 million yuan, which is 200,000 yuan less than the planned investment, indicating that the planned speculation is ——

420 + 20 = 440 (10,000 yuan).

The article asks how many percent of the savings were made, which should be used: the savings divided by the planned investment funds - 20 440 100

A: Saved.

The second question is set: the ** of the pants is x, and the ** of the top is 5/6 x.

x+5/6x=440

11/6x=440

x=440×6/11

x=240 (yuan).

5 6 240 = 200 (yuan).

A: A shirt is 200 yuan, and a pair of pants is 240 yuan.

The third question is to find the volume of this cube -

6 6 6 = 216 (cubic centimeters).

Since it is said that the largest cone is dug from the bottom surface of the square, then its diameter must be the length of the side of the cube, and then count step by step - (6 2) (6 2) 6 cubic centimeters).

cubic centimeters) A: The remaining volume is cubic centimeters.

Choose me, I've been thinking about it for a long time to be so detailed, and I definitely didn't copy it!!

1 Planned investment of 4.4 million yuan Save: 20 440 = 2 set pants x yuan and jacket 5x 6 yuan.

x+5x 6=440 gets x=240 5x 6=200, so pants 240 tops 200 yuan.

Note that the savings here should be 2 percent on top of the expected investment x + 5/6 * x =440

11/6 * x = 440

x = 240

Pants = 5 6 * 240 = 200

3.Cube volume = 6 * 6 * 6 = 216 cubic centimeters of maximum cone volume = pi * 3 * 3 * 6 3 = 18 * pi (the ground is a circle with a diameter of 6).

The remaining volume = 216 - 18*pi = cubic centimeter (two decimal places remained).

。5%2.Solution: Jacket is $x, pants are $5/6x.

Top: x + 5x 6/6 = 11x 6/6

440 = 11x 6ths

x = 440 11x out of 6

x=240 pants: 240*5/6 = 200

Cubic centimetre.

The following * represents multiplication.

1. The most 98 points.

337 divided by 5 and 2; Then divide the fifth result by 5 and 3 close to 100, the most crossed Shuwei 98 and 15 with 10 cm 6 cm as the base, the cylindrical volume is 3 * 3 * 4 = 36 with 4 cm and 6 cm at the bottom, the cylindrical volume is 2 * 2 * 10 = 40 10 cm 4 cm bottom The cylindrical volume is 2 * 2 * 6 = 24 The result is 40

The volume of the cone is 1 3 of the volume of the cylinder at the same bottom, and when the volume of the cylinder is 40.

The volume of this cone-bottomed cone is 40 3

Add to this the weight condition, and the result is (40 3)*(9 2)*25%=15 times. There is a question that can be used.

Use % in order

1.First of all, assuming 100 points, then the total score is 437, not divisible by 5; Then subtract it down, and obviously 435 is the maximum total score divisible by 5, then, the fifth test has a maximum score of 98.

2.First of all, one of the undersides of the cuboid is cut into a square, and then into a cylinder; The volume of the box on the bottom of the square is fixed at a fixed ratio of 4, so the problem becomes how to cut out the box with the largest bottom of the square; Obviously, cutting the bottom surface of a 4x6 to 4x4 is only 1 3 less than 10x4 ->4x4, 10x6 ->6x6

Thus, the square prism volume: 4x4x10 = 160, the cylindrical volume: 160 4*40

The volume of the cone is 1 3 of the cylinder with the same bottom area and the same height, and the volume of the cone is:

3.Only 200%, 125%, 10% left, so you can only shrink first: 10%.

Then zoom in: 200%, 200%, 200%, 125%.

5 times.

The first step is a speed ratio of 1:(1-25%)=4:3, and the second step is a time ratio of 3:4

Normal walking time 12x3 = 36 minutes = hours of normal walking speed.

Finally, calculate the distance between the two villages.

The ratio of normal walking to slow walking speed is 1:(1-25%)=4:3Because the distance is certain, the time ratio of normal walking to slow walking is 3:

4. The time difference is 12 minutes, so the normal walking time is 12x3=36 minutes = hours, and the normal walking speed is the last use.

Sixth grade, yes, you can set 1 unknown, solution 1 consider this uneven road. Assuming that the original speed is x to walk this uneven road, the result is that the time taken is x+12 due to the actual slowdown

Then depending on the distance the same, the speed is inversely proportional to the time. The ratio of actual velocity to original velocity is 3:4=, then.

x (x+12) = x= so x=36 minutes.

Then this section of the road was originally planned to take 36 minutes, which is only 36 330 = 6 55 of the total time

Then the kilometer also accounts for only 6 55 of the total distance

So total distance = km)

Solution 2, assuming that the whole road is uneven, then because the speed is slowed down to the original 3 4, the time taken is the original 4 3

330x4 3 = 440 (minutes), it will take 440-330 = 110 minutes more, but in reality it is only 12 minutes more, so actually.

The overtime accounts for 12 110=6 55 of the total time, which means that kilometers only account for 6 55 of the total distance

So total distance = km)

1-75% = 25% 25 percent equals three-fourths.

Uneven road time: 12 divided by three-fourths = 48 points.

Normal walking: 48-12=36 points.

36 minutes = hours.

Kilometers per hour traveled are divided.

5:30 = hour.

The demobilization speed is x x = 8 15 due to the fact that it is per minute.

Solution: Regardless of before or after melting, its volume is unchanged, and the volume formula of the cone is: one-third times the height of the bottom area.

The base area is calculated as: the square of the radius.

So there is the formula: 12 12 h 1 3 = solution high h = decimeter.

First 4 3-7 12 = 16 12-7 12 = (16-7) 12 = 9 12

Then 9 12 + 1 12 = 10 12

Then 10 12 + 1 24 = 20 24 + 1 24 = 21 24 = 7 8 The second method 4 3 = 1 + 1 3