A second grader asked

Summary. Kiss, you can also ask questions about nature: The first question is why are the leaves yellow in autumn?

The second question is why do leaves fall from trees in autumn? The third question is why there are no leaves on the trees in winter. The fourth question is why does it rain in the sky?

The fifth question is why is autumn not as hot as summer? The sixth question is why does it thunder on a rainy day? The seventh question is: why does nature have spring, summer, autumn and winter?

Hello, it's a pleasure to answer for you, dear, the questions I would like to ask in the second grade are:1How can I increase my second-grader's interest in learning?

2.How to effectively help second-graders better grasp knowledge? 3.

How can I improve the learning ability of second-graders? 4.How to develop independent thinking skills in second-year students?

5.How can you stimulate creativity in 2nd graders?

Kiss, you can also ask questions about nature: The first question is why are the leaves yellow in autumn? The second question is why do leaves fall from trees in autumn?

The third question is why there are no leaves on the trees in winter. The fourth question is why does it rain in the sky? The fifth question is why is autumn not as hot as summer?

The sixth question is why does it thunder on a rainy day? The seventh question is: why does nature have spring, summer, autumn and winter?

15 people, because there are six people on one side, and the students on the three vertices, each person will have a majority of once, so the calculation uses 6*3=18 (people), and then subtracts 3, which is 18-3=15 (people).

Students stand in a triangular queue to play games, 6 people stand on each side, how many students are there?

This problem is equivalent to the problem of planting trees: planting at one end and not planting at the other.

So a tree is equal to the number of segments: 6 3-3 = 15 (pieces).

A: There are 15 students in total.

6 on each side, excluding the first and last two on each side, plus the triangle with 3 vertices, that is:

3 4 3 = 15

Each person has changed from 3 to 4 per person, and each person has increased by 1 piece. If you have a few children, you have to add a few pieces, and in other words, you have to add a few pieces of candy in total, which means that there are a few children.

Originally, there were 2 more pieces when each person was 3 pieces, and later another 4 pieces had to be added to make each child have 4 pieces, so there were a total of 2 + 4 6 pieces of sugar to increase each child from 3 to 4 pieces. This means that there are 6 children in total.

The next one is easy to explain, and there are 2 more when each of the 6 children has 3 yuan. 6 people 3x6 18 pieces, and then add 2 more pieces, which is 18 + 2 20 pieces.

Less four means that there are still four people who have not been allocated, so it means that the number of people must be greater than four. Let's say it's five, six... Because it's the second grade of elementary school, I can only verify them one by one.

The second grade of primary school is so young, and it feels like any explanation is heaven for them

I had to go to the supermarket to buy candy and then actually demonstrate how to do it

There is 1 dog in the first type, 2 in the second type and 3 in the third type.

They are 1, 2, and 3. Hope it helps.

1. The cost of losing a pair of pants is 17 yuan + 29 yuan = 46 yuan for the customer 2, it should be 91 (the 4th number in the first row = 3 * 5, the 4th number in the second row = 4 * 7, the 4th number in the third line = 5 * 9, and so on, the 4th number in the fifth line can not be split according to "90 * 3 + 20": 90 yuan is consumed, 20 is extracted from the discount, and the two belong to different types. From the student's point of view, 300 = 90 * 3 + 30 (consumption + returned discount), from the point of view of the clerk:

300 = 250 (for the boss) + 20 (for yourself) + 30 (for the discount returned to the student).

First of all, the list price is 21, the cost is 18

When the boss sells the gift to the young man, his income is 21-18=3, but when the neighbor and the boss ask for compensation, the boss takes out 100, that is, 100 expenses minus 3 yuan income equals the final 97 losses.

Many people are counted as 197, and the reason lies in the fact that the boss turned out the 100 change for the young man's money, and the boss did not use his own money. That is, when exchanging money, it has nothing to do with the cost of the boss. This is also the reason why everyone calculates 100 + 97 = 197.

The correct answer is 97