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How many square meters is 200 mu
1 square meter = 0.0015 Mu
200 mu = 200 △ 0.0015 = 133333 square meters
How many liters is a kilogram of diesel
You need to know the density of diesel
Affected by quality and air pressure
At present, the average value is 0.84
That is to say, 1 liter gasoline = 0.84 kg
1 ton diesel = 1000 / 0.84 = 1190 liters
One liter is equal to one liter
How to open the root of the third power manually, please tell me in detail, thank you
What I mean is to take a pen and calculate it without any tools. Thank you
Open the calculator in the attachment of the computer, select scientific type, type "V" in front of "inv" on the upper left, input the number of square root (such as 50) on the right, press "XY" key on the left keyboard, input the number of square root (such as 3) on the right, and press "=" sign to get:
3.684031498603866057798228335798.
1. 1,4,8,16,24 ()
4*1+4=8,
2*4+8=16,
1*8+16=24
0.5*16+24=32,
25 * 24 + 32 = 38, so the space is 32,38
Let K belong to Z. the following angles with the same terminal edge are a. (2k + 1), 180 ° and (4K ± 1), 180 ° B.K., 180 ° + 30 ° and k.360 °± 30 °
Choose a 4K ± 1 and 2K + 1 to be equivalent when k ∈ Z
As for B, for example, at 210 degrees, the latter can't reach it
Let f (x) be a continuous even function, and if x > 0, f (x) be a monotone function, then the sum of all x satisfying f (x) = f (x + 3x + 4) is ()
A. -8B. -3C. 8D. 3
∵ f (x) is an even function, and if x > 0, f (x) is a monotone function ∵ f (x) = f (x + 3x + 4) is equivalent to x = x + 3x + 4 or − x = x + 3x + 4 ∵ x2 + 3x-3 = 0 or X2 + 5x + 3 = 0, then X1 + x2 = - 3 or X3 + X4 = - 5. The sum of all x satisfying f (x) = f (x + 3x + 4) is - 3-5 = - 8
Olympic mathematics problems
1. Xiaoling has raised a group of rabbits, including white, gray and black. There are 21 rabbits in three colors. The number of white rabbits is more than 7 times and less than 8 times that of gray rabbits. How many rabbits are there in each of the three colors?
(formula)
2. In a subtraction formula, the sum of the subtracted, the subtracted and the difference is 840, where the subtracted is 276, the subtracted is (), and the difference is ()
3. The grass in the pasture can feed 30 cows for 6 weeks, so how many cows can these grass feed for 4 weeks?
(formula)
1. Xiaoling has raised a group of rabbits, including white, gray and black. There are 21 rabbits in three colors. The number of white rabbits is more than 7 times and less than 8 times that of gray rabbits. How many rabbits are there in each of the three colors?
(formula)
From known sources,
If there is one black rabbit, the white rabbit is not an integer,
If the number of black rabbits is 3, the number of white rabbits is more than the total number of rabbits
Therefore, there should be two black rabbits,
Then the white rabbits will be more than 2 * 7 and less than 2 * 8, that is 15
Then 21-15-2 = 4 was used as the total number of grey rabbits
In conclusion, there were 2 black rabbits, 15 white rabbits and 4 grey rabbits
2. In a subtraction formula, the sum of the subtracted, the subtracted and the difference is 840, where the subtracted is 276, the subtracted is (), and the difference is ()
Subtracted = difference + subtracted
What is the subtracted number
840÷2＝420
What's the difference
420－276＝144
3. The grass in the pasture can feed 30 cows for 6 weeks, so how many cows can these grass feed for 4 weeks?
Common pasture grass
30×6＝180
How many cattle can be fed for four weeks
180 △ 4 = 45 heads
1 2 3 4 5 6 7 8 9 how to add and subtract? Eg: 123 + 4-5 + 67-89 = 100
123-45-67 + 89 = 100 take me!
The calculation problem of the equation of one degree with one variable (pure calculation problem,
Brother, it's a little harder for me
Solve the following equations about X: 1, 2 (x + 2) + 4 = 9 2x + 4 + 4 = 9 2x = 9-8x = 0.522, 2 (x + 4) = 10 2x + 8 = 10 x = 13, 3 (X-5) = 18 3x-15 = 18 3x = 33x = 114, 4X + 8 = 2 (x-1) 4x + 8 = 2x-22x = - 10x = - 55, 3 (x + 3) = 9 + x3x + 9 = 9 + XX = 06, 6 (x / 2 + 1) = 123x + 6 = 123x = 6x = 27, 9 (
1+2+3+4+5+6+7+8……… +10000-1000
36+……
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