Math Problems Primary 6 4 Applications

1 Occupy an area: 4*2 8 (square meters).

Volume: 4 * 2 * cubic meters) = 6400000 (cubic centimeters) 2 1 meter 100 centimeters 180 cubic decimeters 180000 (cubic centimeters) 180000 (100 * 40) 180000 4000 45 (centimeters) 45 40 5 (centimeters).

3 Surface area: (12*8 12*7 8*7)*2 12*8*2472 192 664 (square centimeters).

Volume and: unchanged 12 * 8 * 7 672 (cubic centimeters) 4 Area: 100 * 7 * 2000 1400000 (square centimeters) 140 (square meters).

Volume: 1400000*3 42000000 (cubic centimeter) cubic meters).

*2 Floor space.

4*2* Convert cubic meters into cubic centimeters.

2. Convert the unit into rice and then calculate, and then divide it.

3. Cut straight and then calculate the surface area.

7*3*2000 is the area unit: cubic centimeters and then convert the unit into cubic meters.

If you don't study well, I'm your math teacher.

x=10 The second question is understood in this way.

1.The number of people in the first workshop is 1 3 of the number of people in the other three workshops, then the first workshop is the average of the other workshops, that is, the first workshop accounts for the total number of workshops: 1 (3+1)=1 4;The second workshop accounts for 1 (4+1)=1 5;The third workshop accounted for:

1/（5+1）=1/6.In this way, we can find out the fraction of the fourth workshop in the total workshop: 1-(1 4+1 5+1 6)=23 60

This question is a standard quantity, the standard quantity = the number of parts corresponds to the score, then: 92 (23 60) = 240 (person).

2.Since the figure for the soccer markup is not given, we use X instead.

Solve with the equation: Let the soccer ball be each a-yuan.

50a*(1+x%)+3000/【50a*(1+x%)】1+11%）=3000+298

Because x is not given, it is impossible to find the value of a, and after x is given, apply the above equation to find the value of a, and then find the ** of basketball.

Basketball: (3000-50a) 40

A and B respectively set off from AB and traveled in the same direction, their speed ratio was 3:2 when they started, after the encounter, A's speed increased by 1 5, B's speed increased by 2 5, and when A arrived at B, B was still 26km away from A. How many kilometers are the two places apart?

Let AB and the two places be separated by x kilometers.

2/(3+2)x]/[3×(1+1/5)]=[3/(3+2)x-26]/[2×(1+2/5)]

x/9=3x/14-130/14

13x/126=130/14x=90

A, B, and C went shopping together, and 1 2 of A's money was equal to 1 3 of B's money, and 3 4 of B's money was equal to 3 5 of C's spending, and C spent 98 yuan more than A, and asked them how much money they had spent.

490 yuan. A and B run a 100-meter run (assuming their speed remains the same), and when A runs 75 meters, B runs 60 meters. So, how many meters did B run when A reached the finish line?

80 meters. 1/6 + 1/12 + 1/24 + 1/48 + 1/96 + 1/192

Truncating a cuboid by 2 centimeters along its length and subtracting only 4 sections, we know that the cross-sections are the same area. You can think about this by yourself, or use your hands to make a deeper impression. Because the four identical faces were removed, the area was reduced by another 80 square centimeters.

So the area of the truncated 1 face is 20 square centimeters. In the question, we are told that it is truncated by 2 centimeters along the length. Area divided by length equals width, so 20 divided by 2 = 10

The rectangle width is 10cm. The width is 10, and we know from the title that the length is 10+2=12cm. Because the cuboid is truncated 2 cm along the length to get a cube, the height is also 10 cm.

Then the volume of the rectangle is 10x10x12=1200. The equation is: 80 4 = 20cm 20 2 = 10cm 10x10x(10+2) = 10x10x12 = 1200

Solution: The side side length of the box: 80 2=40 (cm) The width and height of the box:

40 4 = 10 (cm) Length of the box: 10 + 2 = 12 (cm) The volume of the original box: 10 10 12 = 1200 (cubic centimeters) Answer:

The volume of the original cuboid was 1200 cubic centimeters.

You put that top surface one to the bottom exactly four sides are 80 square centimeters. 80 divided by four is the side that is quit is 20 square centimeters, 20 divided by 2 is equal to 10, 10 is the bottom of the rectangle, the height of the rectangle is 10 + 2 = 12 cm, since the ground area is a square, 10 times 10 times 12 = 1200 square centimeters Solution: The side side length of the cuboid:

80 2 = 40 (cm).

Width and height of the box: 40 4=10 (cm) Length of the box: 10+2=12 (cm) The volume of the original box:

10 10 12 = 1200 (cubic centimeters) Answer: The volume of the original cuboid is 1200 cubic centimeters.

Let the long side be xcm, then the short side is x-2cm

4x(x-2)-4(x-2)(x-2)=80 to solve the equation to get x=12;x-2=10

The volume of the rectangle: 10 * 10 * 12 1200 cubic centimeters.

A rectangle is cut along the length, and the reduced surface area is actually (2x H + 2x W) x 2 = 80

And because you get a square, height = width.

Let the height (or width) be x, then.

2x+2x)x2=80

x=10, so the volume of the original rectangle is (length x width x height).

Length = height + 2 = 12cm

So the volume is.

12x10x10 = 1200 square centimeters.

The circumference of the square is 80 2 = 40 cm, the side length of the square, 40 4 = 10 cm, and the volume of the original cuboid is 10x10x (10 + 2) = 1200 cubic centimeters.

The side circumference of the cuboid is.

80 2 = 40 (cm).

The width and height of the cuboid are.

40 4 10 (cm).

The length of the cuboid is.

10 2 12 (cm).

The volume of the box is.

12 10 10 1200 (cubic centimeters).

Let the original cuboid be x cm long.

then the new cube is x - 2 cm long.

The surface area is 6 (x-2) (x-2) square centimeters.

The original surface area of the cuboid is 2(x-2)(x-2)+4x(x-2), which is determined by question 2(x-2)(x-2)+4x(x-2)-6(x-2)(x-2)=80

The solution yields x=-3 or x=6

Because x is greater than 0

So x=6, so the cuboid volume is 6*4*4=96 cubic centimeters.

Set x sheets of 5 corners and (x+42) sheets of 2 corners, so x=48, so donate.

There are x sheets with five corners, and y sheets with two corners.

y-x=42

x=48 of the solution

y=90x=48 total yuan.

Solution: If the one with five corners donates x pieces, then the two corners donate x+42 pieces 5x-2(x+42)=60

5x-2x-84=60

3x=144

x=48x+42=90

5x48 + 2x90 + 800 = 240 + 180 + 800 = 1220 (corner) = 122 (yuan).

Set 5 corners of A sheets, 2 corners of A + 42 sheets.

a=48

So a total of 48* was donated

Let Xiaohong have x five-corner banknotes, so Xiaohong has two-corner banknotes (x+42), and the equation can be set:

x=48, so Xiaohong donated a total of yuan.

80 yuan coin, 48 five jiao, 90 two jiao, a total of 122 yuan.

A total of 122 yuan was donated, which is not a primary school question, but a junior high school question.

1, 2 3 square centimeters) = square meters).

Yuan) 22 meters = 20 decimeters.

20 9 kg).

3.40 30 25 = 30,000 (cubic centimeters) (40 30 + 40 25 + 30 25) 2 10 = 17,200 (square centimeters).

4。40 40 2 = 3200 (cubic centimeter) centimeters.

3 3 g 311 g.

6。We're talking about just the side area, I don't know what you're talking about.

20 square centimeters.

The last few questions are Shenma?? Don't you see? See the first 6 questions.

square * 10 * 2 * (40 * 30 + 40 * 25 + 25 * 30) = 59000 or 1, 2 3 square centimeters) = square meters) yuan).

2.2 meters = 20 decimeters.

20 9 kg).

3.40 30 25 = 30,000 (cubic centimeters) (40 30 + 40 25 + 30 25) 2 10 = 17,200 (square centimeters).

4。40 40 2 = 3200 (cubic centimeter) centimeters.

3 3 g 311 g.

6。We're talking about just the side area, I don't know what you're talking about.

20 square centimeters plagiarized.