On the ant experiment

One day, my friends and I were playing outside. All of a sudden, we found a group of ants were busy with what to do. I heard that ants were afraid of the smell of camphor balls and wanted to do some experiments to prove whether it was true. So, I went to a nearby store with my friends and bought a camphor ball

1: Suppose you have a friend who wants to travel to China, and ask him to pay attention to something, such as: if you go to the beach, remember to bring something with you
2: Write in the form of a letter. Don't write the name of the last writer or to whom. Just write (xxx) 3 x's
3: Within one day
It's not to be translated into English, it's to be written in English

1: Supply you have a friend to come to China to travel, what to his attention, such as: go to the beach, then remember to bring something

The teacher asked us to write a composition, 600 words,

After a busy winter vacation diary for a semester, it's still a little uncomfortable to stop at the beginning. At ordinary work, I get along with students every day. Although they are naughty and make me angry, I still miss them for a long time. I'm still thinking about whether they will be more obedient when they come

A letter to the teacher, the end of the composition a little more lively, urgent ah ah!

1: Approximate points
16 / 24, 45 / 30, 160 / 75, 625 / 1000
2: General division
(1) 7 of 18 and 3 of 10 (2) 2 and 4 of 9 and 3 of 2 and 5 (3) 1 and 7 of 10, 11 of 15 and 9 of 2 and 20

1. Divide by 8 = 2 / 3, divide by 15 = 3 / 2, divide by 5 = 32 / 15, divide by 125 = 52 / 8, divide by 7 / 18 times 5 / 5 = 35 / 90, multiply by 3 / 10 times 9 / 9 = 27 / 90, multiply by 4 / 9 times 5 / 5 = 20 / 2, multiply by 3 / 2 times 9 / 9 = 27 / 2, multiply by 5 / 5 = 20 / 2, multiply by 3 / 2 times 9 / 9 = 27 / 2, multiply by 9 / 45, ③ 1

There are four rational numbers: 3, - 5, - 7, - 13. How to add, subtract, multiply and divide to get 24,

[（-5）×（-13）-（-7）]÷3=24

1. The original price of this product is 15 yuan after 10% discount. How much is the original price of this product?
2. 1472kg of rice is produced in a real estate, 3 / 20 higher than planned?
3. For a project, it takes 8 days for Party A and Party B to cooperate and 5 days for Party A, Party B and Party C to cooperate. How many days does it take for Party C to do it alone?

1. Original price = 15 (1-0.9) = 150 yuan
2. Plan = 1472 ÷ (1 + 3 / 20) = 1280 yuan
3. C = 1 ÷ (1 / 5-1 / 8) = 40 / 3 days

1. Farmers fertilize rice by applying 1125 kg of chemical fertilizer in a 250 meter long and 200 meter wide rectangular paddy field. How many kg of chemical fertilizer are applied per hectare on average?
The wheat field is rectangular, 200 meters long and 200 meters long
Farmers can harvest 3 tons of wheat per hectare. How many tons of wheat can be harvested in this wheat field?
Fill in the brackets with the appropriate unit (answer the question number and unit, OK, to the primary school unit)
1. A building covers an area of 2500 ()
2. Cover length of mathematics book 4 ()
3. China's territory is about 960 ()
4. The highway from Chongqing to Wanzhou is 226 ()
Fill in the blanks (answer question number and answer)
1.45 square meters = () square decimeters
2.2500 square centimeter = () square decimeter
305 square decimeters = () square meters () square decimeters
200 ha = () m2
1 square kilometer = () hectare = () square meter
5 square decimeters 60 square centimeters = () square centimeters

Ha ha, it's good to have Internet. Don't use your brain

Is the square B of minus 3A a monomial

Yes

4X + 69-3x = 84, how to solve it

4x–3x=84–69
x=15

On the ant experiment