Topic, 50 marks, 6th grade technology

Answer: Reduced by one percent. 240-160] 240 = 1 3 = 121-6 = 115 color TVs per 100 households last year; An increase of 6 115 = an actual overload of 24 480 = 5 per cent

The volume of the cuboid is 6 4 3 = 72 cubic centimeters; The largest cube volume is 3 3 3 = 27 cubic centimeters; The volume is reduced by (72-27) 72=

B's work efficiency is faster than A's (10-8) 10=20%.

4 meters is 5 meters, 4 meters are shorter than 5 meters, and 5 meters are a few percent longer than 4 meters. The Earth's oceans cover a percentage of the Earth's surface, and the landmasses account for a few percent of the Earth's surface. [3] The number of sides of a triangle is a few percent less than that of a parallelogram.

The number of boys in class 6 is 125 percent that of girls, and the number of boys is a few percent higher than that of girls. How many percent is the rice cooker's ** reduced? The original price is 240 yuan, and the current price is 160 yuan This year, Xiaokang Village has 121 color TVs per 100 households, an increase of 6 over last year

4] A supermarket originally planned to transport 480 boxes of edible oil, but actually transported 24 boxes more, how many percent did it actually ship? The length, width and height of a cuboid block are 6 cm, 4 cm and 3 cm respectively. If it were sawn into the largest cube, how many percent would it be less than the original?

If a job is done alone, A takes 10 hours and B takes 8 hours, how many percent faster is B's work efficiency than A?

According to the formula for the area of a circle, the s circle is equal to the square of the vulture, and the column formula is (the square) of one (the square) to get the square that is equal to .

1.There is a semicircular piece of glass with a diameter of 14 cm and its circumference is ( ) cm

2.When the radius of a circle increases by 1 cm, the area increases by (radius + 1) cm).

3.The area of the circle and the sides of the square are equal in length, both are 5 cm, then the area of the square is (25cm) and the area of the circle is ( ).

Let r be the radius of the circle.

Known: Vulture=1radius = 14 2 = 7

Perimeter = Vulture r + 14

2.The area has been increased (2r+1).

Reason: Area formula = Vulr 2

Radius increased by 1 cm ---r+1

Area = Vulture (r+1) 2

Vultures (r 2+2r+1).

This has been increased by 2r+1 in total

3.Question: You said that the area of the circle and the length of the square side are equal to 5 cm, then you still need to find the area of the circle (is there a mistake, I will use the radius of the --- circle = 5 cm--- to solve the problem).

Square area = 4 side lengths.

20 (cm).

Circle area = Vulr 2

25 vultures.

1.Perimeter =

2.It is not fixed, and is related to the original radius (2r+1).

3.The area of the circle and the square, both 5 cm (problematic), if it is the circumference of the circle:

The square area is 25 square centimeters, circle: square centimeters.

Analysis: From the graph.

The circumference of the black part = the circumference of a full circle The length of two diameters, so the circumference of the black part = 3·14 8 2 8 2 2 = 82·24 cm, if you don't understand, you can also ask! If you are satisfied, please adopt it in time! o(∩_o

The perimeter is 32+16 Perimeter = 2 straight lines + C garden (two arcs can be put together into a whole circle) 2 straight lines = 2 (8 + 8) = 32, C garden = 2 8 = 16

Let's find the area of the black part.

The total number of people in the first and second workshops is invariant.

In the question, "the ratio of the number of people in the two workshops of a certain factory is 5:3".

Launched: a workshop to occupy.

The total number of people in the first and second workshops is 5 8

In the question, "the ratio of the number of people in the first workshop to the number of people in the second workshop is 2:3".

Launched: a workshop to occupy.

The total number of people in the first and second workshops is 2 5

The two workshops have a total of = 36 (5 8-2 5) = 160 people.

It doesn't work without equations, it turns out that there are 5 8 people in workshop 1, and after the number of people is adjusted, there are only 2 5 people, and if there are 36 people, it is the whole.

5 8-2 5 = 9 40 So there are 36 (9 40) = 160

Set up 1 factory x 2 factory Y

x：y=2：5

x-36：y+36=2：3

Just solve the system of equations.

Do it with equations, and solve it upstairs.

Circumference = 3 * decimeters).

The area covered by the tabletop: square decimeters).

Circumference decimeters.

The area is 7 decimeters.

The circumference is equal to d=3 decimeters.

The area is equal to r 2=9 4 square decimeters.

1.Convert 54 km to meters: 54*1000=54000 (meters).

2.Calculate the remaining distance after the first day: 54000-54000*46%=54000-24840=29160 (meters).

3.Calculate how many meters were walked the next day: 29160*2 3=19440 (meters).

Shadow semicircle 6 6 36

Half circle 3 3 2 shades