6th Grade Math Speed Points are given if you are good

1.The simplest integer ratio of 2 is (8 3), and its ratio is (8/3).

3.For a section of the road, car A will travel in 5 hours, and car B will finish in 4 hours, so the speed of car B is faster than that of car A (25)%.

4.Divide a circle with a circumference of centimeters into two semicircles, and the circumference of each semicircle is (centimeters.

5.The simplest integer ratio is (18:25).

20% lighter than (25 kg).Meters are longer than 5 meters.

7.A work, started on June 1, originally scheduled to be completed in one month, when the actual construction was completed, the task was completed on June 25, and it was overcompleted by June 30 (20)%.

8.The ratio of number A to number B is 7:3, the quotient of number B divided by number A is (3/7), and number A accounts for (70)% of the sum of the two numbers

9.Pi is the ratio of (the circumference of a circle) to (the diameter).

10.The 2 3 of the number A is equal to the 3 4 of the number B, and the simplest integer ratio of the two numbers A and B is (9:8).

11.The mother deposited 60,000 yuan in the bank for a fixed period of one year, and the annual interest rate was one, and the mother withdrew a total of (61,350) yuan from the bank after one year.

12.The area of the two rectangles is equal, and the ratio of the length of the two rectangles is known to be 8:5, and the ratio of their widths is (5:8).

13.Xiao Ming's father's monthly salary is 1840 yuan, according to the relevant provisions of personal income tax, more than 1200 yuan part of the personal income tax to be paid (just look at the tax rate as 5, generally 5), then Xiao Ming's father's monthly salary should pay income tax (32) yuan.

kilograms, the second question is incomplete.

9. The circumference of the circle and the diameter of the circle.

13. The tax rate of individual income tax is not stated, and the calculation method is (1840-1200) tax rate = 640 tax rate.

9.Circumference Diameter.

Rate. I don't understand, I asked.

1,8:3,8/3

2 What does it mean.

9. The circumference and diameter of the circle.

13 tax rates.

1,8:3 2, 7 3,25﹪ 4, 5, 18:25 6,25kg ?

7, 20% 8, 3 7 70 9,Circumference,Diameter 10,9 8 11,61350 12,5 8 The second question of the sixth question, and the 13th question seem to be not given the right condition. The others are pretty much right. Oh!

Her average rate is: 4:00 hours-3:

20 hours = 40min Her average rate is: 2 km = 2000 meters 2000 40min (40 min = 2400s) 2000 2400 = two decimal places) (full) Her average rate is: 2000 2400 = two decimal places).

2 x 1000 4:00-3:20) 60 = 2000 40 60 = 50 60 = 5 6 Her average rate is 5 6 meters per second 2007-06-15 11:

39:03 Added: good

Reference: me

The average rate is: (2 1000) (20 60 60) = 2000 20 = 100 (meters per second).

Reference: me (I am in the sixth grade and listen to the daily test of mathematics).

3:20 - 4:00 = 40 minutes on the left = 40 x 60 on the left = 2400 seconds (60 seconds in a minute) 2 km = 2000 meters Average speed = 2000 meters divided by 2400 seconds = meters per second (one second row meters or 83 centimeters).

Reference: I Form 6.

Her average rate is: (2x1000) (40x60) = 2000 2400 = 5 6 (m s).

Seconds used = 40 x 60 seconds Distance traveled = 2 x 100 meters Average rate = (2 x 100) (40 x 60) 2007-06-07 20:07:06 Added:

Sorry, yes (2 x 1000), no (2 x 100).

1。。。First, find the volume of the oil drum, and convert it to 14130 cubic decimeters according to the bottom area multiplied by the height m.

14130 120 = 118,, so not enough.

2.。。The water surface drops by 2 decimeters. Then the falling volume is 15 * 2 = 30 cubic decimeters, that is, the conical volume.

So the area at the bottom of the cone = 30 8 = square decimeters.

3.。。Because the circumference of the bottom surface of the cylinder is one side of the figure. And the height of the cylinder is on the other side of the back.

i.e. circumference = 2 r = high.

So after is the square.

4.。。Since the height of the cylinder is two-thirds of the height of the cone, the height of the cylinder can be set to be 2x and the height of the cone to be 3x.

Then set the bottom area is y

And because the volume of the cone is 12 cubic decimeters, then the column formula 3x*y 3=12 then xy=12

So cylindrical volume = 2x*y = 24

above symbols" * "is a multiplier sign" / "is a division sign.

3 Let the radius r, then the height is 2tt r.

The circumference of the bottom surface of the cylinder is 2tt r ,s

So in the future, the height and the bottom are equal, of course, it is square.

4 cylindrical volume = tt r 2 h1

The volume of the cones = 1 3tt r 2 h2 = 12 and their bottom area is equal, h1 = 2 3 h2

So the solution gives the cylindrical volume = 24 dm2

The first way: 120 120 = 14400 square decimeters = 15 decimeters 2 meters = 20 decimeters.

The square of 20 = 14758 cubic decimeters.

the second way: the volume of the cone; 2 15 = 30 cubic decimeters bottom area: 30 8 = square decimeters.

I can't do the other two, because I'm also worried!

1.The minimum four-digit even number that can be used at the same time is (1050).

2.The reciprocal of the smallest composite number is the ( of the smallest prime number

3.A fraction, the numerator is the smallest composite number, and the denominator is the smallest prime number of two digits, this fraction is (4 11).

4.Divide (note not by dividing) by the prime number A 2033, the quotient is a two-digit number, and the remainder is 35The prime number a is (18) and the quotient is (41).

5.In the four numbers and 18, (

and (is a prime number 1.)The minimum four-digit even number that can be used at the same time is (1050).

2.The reciprocal of the smallest composite number is the ( of the smallest prime number

3.A fraction, the numerator is the smallest composite number, and the denominator is the smallest prime number of two digits, this fraction is (4 11).

4.Divide (note not by dividing) by the prime number A 2033, the quotient is a two-digit number, and the remainder is 35The prime number a is (18) and the quotient is (41).

5.In the four numbers and 18, (

and (are prime numbers.

Hello Xiao Tianxian:

Sand pile volume: cubic meters).

Thickness of the paving: 2 cm m.

Can pave length: m).

Sand pile volume:

The thickness of the shop: 2cm

I can pave the length:

Assuming that x meters can be laid, 2cm = then there is.

This is the volume of the sand laid) = this is the volume of the cone).

x=A:——

The volume of the cone is 2*15=30 cubic decimeters.

The formula for the volume of the cone is v=1 3 *s*h

s=3v/h=

Total oil volume = cubic meters.

The total amount of the car needs to be slowed down = 120 120 = 14400 cubic decimeters = cubic meters.

The gasoline in this cylindrical drum could not fill the tanks of the 120 gas cars.

Hello Xiao Tianxian:

Oil barrels have oil: macro do hole cubic meters) 14130 (standing dry square decimeters) 120 cars to oil:

120 120 14400 (cubic decimeters).

Because 14,130 cubic decimeters and 14,400 cubic decimeters, it can't be fully filled.