What are the improvement questions for the optimization problem of the Olympiad in the third grade o

In order to ensure that several boxes with a total weight of 10 tons and the weight of each box does not exceed 1 ton are unloaded on the freighter, in order to ensure that these boxes can be transported at one time, how many cars with a load of at least 3 tons are needed?

The question you ask also has to be on the topic, so everyone can help you, who has a bunch of reference books with them for reference? Know what regional exam questions, what pages of what books, how many pages of someone's Olympiad questions, what is the software of famous schools in what region, etc., think about how others can help you before you come up with questions, in addition to helping you think about the questions, do you have to spend money to buy books to help you answer the questions? Previous**or **won't?

The one with less time is at the front, so that there is less waiting time at the back.

1 10, which means that 10 people are waiting after fetching water, 1 point per person, 10 people are 1 10 points 2 9, which means that 9 people are waiting after fetching water, 2 points per person, and 9 people are 2 9 points......1×10＋2×9＋3×8＋4×7＋5×6＋6×5＋7×4＋8×3＋9×2＋10×1

220 points.

165 This is a test of the process.

The time used by the person in front to fetch water and the person behind have to wait, and it is obvious that the person who takes less time is the first person in front. 1

Second. 1+2

Third: 1+2+3

Ninth. 1+2+3+4+5+6+7+8+9

Fetching time is from least to most so that the total amount of time spent by each person is as small as possible.

(1) The length of each of the 12 cars (2) is, let the width be x, the area is y, and the ( get -2 (x-25 8) 2 + 625 32 = y When x = 25 8, y max = 625 32 (3) (4) The first to take has a winning strategy. For example, A first takes 1 of the middle of the 53 chess pieces, so that the rest is divided equally into 26 pieces on the left and right sides. At this time, B takes 1 or 2 grains on one side of it, and A then takes 1 or 2 grains in a symmetrical position on the other side, and so on, A will surely take the last one and win.

The most accurate answer is 12 minutes.

Take milk and newspaper (5 points).

Organize your bag (6 minutes).

The two are carried out in succession, in no matter what order.

At the beginning of the period, a kettle of water was boiled at the same time (8 points), and there was no effect on each other.

All of the above at the same time for 11 minutes.

Finally, it took 1 minute to add boiling water, for a total of 12 minutes.

Note: It is not necessary to boil the water immediately after it is boiled. Because the water is boiling, as long as the fire is turned off, and many electric kettle equipment for boiling water in life are automatically powered off when the water is boiled.

Therefore, there is no need to separate them for things like organizing your bag or picking up newspapers.

It's 14 minutes.

Boil a pot of water first.

This is the time to organize your school bag.

After tidying up the bag, go to the kettle and wait for it to open.

Then fill with boiling water.

Finally go get milk and newspapers.

Only then is it the fastest.

It's 12 minutes.

Boil a pot of water first (8 minutes).

Go and get milk and newspaper at the same time (5 points).

Go and tidy up your bag (3 minutes).

The kettle was boiled. Then pour boiling water (1 point).

Then go and tidy up the bag (3 minutes).

If a movement cannot be taken apart, it is 14 minutes.

Tidy up the schoolbag for 6 minutes, boil water when tidying up to 3 minutes, and then take milk and newspaper after tidying up, and when you come back, the water is just boiling, and fill with water, that is, 5 + 6 + 1 = 12 minutes.

If an action can't be disassembled, it is to boil water first, and at the same time to unpack the bag, and when you come back, wait for the water to boil, fill the water, and then take the milk 8+5+1=14

I agree with the one above.

Start boiling water - take milk and newspaper - organize the school bag (fill the boiling water halfway) - continue to organize the school bag for 12 minutes, if you sort the school bag first and then take the milk and newspaper, you will not be able to fill the water halfway, it will take more time.

You can do something else in the middle of the way, but it means that you can do something else during the boiling process or be close to the place where you can get busy.

12 minutes. Tank water, boil water, pick up things halfway, and finally organize your school bag.