Answer: The thickness of these paper towels stacked together is 2 million centimeters.

The analysis process of this problem is as follows: 65438+ billion primary school students use one paper towel less each, that is, 65438+ billion paper towels = 65438+ billion paper towels. The thickness of 1 paper towel can be calculated according to the known conditions as long as there are only a few 200 paper towels in the 65438+ billion paper towels.

However, this is an error-prone point. What is 1 tissue pumping? It's just a folded paper towel. What's the meaning of the question? We should fold the paper towels together, not fold them in half and then fold them together. So after we calculate 654.38 billion paper towels, we need to divide by 2 to get the thickness of 654.38 billion paper towels.

And the thickness of 1 100 million tissue is the answer that the question wants us to seek.

Finally, according to the calculation results, the thickness of 1 100 million paper towels stacked together is 2000000cm.

Extended data

This kind of topic belongs to math brain teasers, and you can master it skillfully with more practice.

1. A person bought a chicken for 8 yuan and sold it for 9 yuan. Then he thought it was not worthwhile, 10 yuan bought it back and sold it to another person for 1 1 yuan. Ask him how much money he earned.

Answer: 2 yuan.

2. Suppose there is a pond with unlimited water. There are two empty kettles with a capacity of 5 liters and 6 liters respectively. The problem is how to get 3 liters of water from the pond with only these two kettles.

Answer: Fill it with a 5-liter pot and pour it into a 6-liter pot.

Pour the 5-liter pot into the 6-liter pot until the 6-liter pot is full. At this point, there are 4 liters of water left in the 5 liter pot.

Pour all the water out of the 6-liter pot, and pour the remaining 4 liters of water from the 5-liter pot into the 6-liter pot. At this time, there are only 4 liters of water in the 6-liter pot.

Fill the 5-liter pot again and pour into the 6-liter pot until the 6-liter pot is full. At this time, there are only 3 liters of water left in the 5-liter pot.

3. A farmer took three rabbits to the market to sell. Each rabbit weighs about three or four kilograms, but the farmer's scale can only weigh more than five kilograms. He asked him what he called it.

Answer: weigh three first, then write down one, and calculate the difference after weighing.

A monkey picked 100 bananas in the forest and piled them up. The monkey's home is 50 meters away from the banana pile, and the monkey intends to carry the bananas home.

You can take up to 50 sticks at a time, but monkeys are greedy. He eats a banana every meter. Ask the monkey how many sticks he can take home at most.

Answer: 25.

Back 50 to 25 meters first. I ate 25 at this time, and there are 25 left.

Put it down. I'll recite the remaining 50 later.

At 25 meters, I ate another 25, and I ate another 25.

Then pick up 25 roots on the ground, 50 * * *, and continue to walk home. A ***25 meters, you have to eat 25, and there are 25 left to get home.