People like to visit relatives and friends during the Spring Festival in January or February

People like to visit relatives and friends during the Spring Festival in January or February

People like to visit relatives and friends during the Spring Festival in January or February

Mother is preparing for the Spring Festival

My mother is preparing to celebrate the Chinese New Year.

3200 square centimeter = () square decimeter 4.75 cubic decimeter = () cubic centimeter
3200 square centimeter = () square decimeter 4.75 cubic decimeter = () cubic centimeter () liter = 5.9 cubic decimeter () cubic meter = 3 cubic meter 80 cubic decimeter 6 liter 300 ml = () milliliter 702 cubic centimeter = () cubic decimeter

3.2 4750 5.9 3.08 6.3 0.702

A motorcade is going to deliver a batch of relief materials. It is planned to travel 40 kilometers per hour and arrive in 7.5 hours,
But the disaster area is in an emergency and needs to be delivered within 6 hours. If you travel 45 kilometers per hour, can you arrive in an additional period

40*7.5=300km
300 / 45 is about 6.67
Can't get there

How many tons is a cubic stone

The density of the stone is about 2500kg / cm ^ 3 (different stones have slightly different density). A cubic stone has 2.4 tons

How to write 2.4 - (x-4) / 2.5 = 3 / 5x

2.4 - (x-4) / 2.5 = 3 / 5x, multiply both sides by 512-2 (x-4) = 3x12-2x + 8 = 3x2x + 3x = 205x = 20x = 4, help each other

After a 1.5-meter-long cylinder is sawed into three sections, its surface area is 314 square centimeters larger than that of the original cylinder

Bottom area = 314 △ 4 = 78.5 square centimeter = 0.00785 square meter
Volume = 0.00785 × 1.5 = 0.011775m3
If you understand and solve your problem,

7.8.9.10 how are four numbers equal to 24

8×9÷（10－7）＝24

1.4x square + 10x minus 15y minus 9y square
2.4x minus y minus 6y minus 9
3.3a minus 6ab + 3B minus 5A + 5B
4. Square of x minus 6xy plus square of 9y minus 3x + 9y
5. Square of X + 4Y square + 9z minus 4xy-12yz + 6xz
Please factorize the above formula
Also: prove that the eighth power of 25 minus the fourteenth power of 5 can be divisible by 24
If the square of 1 + W + W = 0, calculate the power of w1980 + w1981 and add it to the power of W2008

I handwritten process, do not understand can ask me, hope to help you

It is known that the opposite number of a is - 1 and 3 / 2, and the reciprocal of B is - 2 and 1 / 2
Does anyone know

∵-A＝1＋3/2
∴A＝-5/2
∵1/B＝2＋1/2
∴B＝2/5
∴A＋3B/A－2B＝(-5/2)＋3·(2/5)/(-5/2)－2·(2/5)＝-189/50