When Gauss was in elementary school, once after the teacher taught addition, because the teacher wanted to have a rest, he came up with a topic for students to calculate. The theme is:

1+2+3+ .....+97+98+99+ 100 = ?

The teacher is thinking, now the children must start class! I used this as an excuse to go out, but Gauss stopped me! ! It turns out that Gauss has worked it out. Little friend, do you know how he did it?

Gauss told everyone how he worked it out: add 1 to 100, and add 100 to 1, adding two lines, that is:

1+2+3+4+ .....+96+97+98+99+ 100

100+99+98+97+96+ .....+4+3+2+ 1

= 10 1+ 10 1+ 10 1+ .....+ 10 1+ 10 1+ 10 1+ 10 1

* * * There are one hundred sums 10 1, but the formula is repeated twice, so the answer is equal to < 5050 & gt.

Since then, the learning process of Gauss Elementary School has already surpassed other students, which laid the foundation for his future mathematics and made him a mathematical genius!

The Mathematical Genius of Animals

Honeycomb is a strictly hexagonal cylinder, with a flat hexagonal opening at one end and a closed hexagonal diamond bottom at the other end, which consists of three identical diamonds. The rhombic obtuse angle of the chassis is 109 degrees 28 minutes, and all acute angles are 70 degrees 32 minutes, which is both firm and material-saving. The honeycomb wall thickness is 0.073 mm, and the error is very small.

Red-crowned cranes always move in groups, and they are arranged in the word "people". The angle of the herringbone is 1 10 degrees. More accurate calculation also shows that the angle of the herringbone is half-that is, the angle between each side and the direction of the crane group is 54 degrees, 44 minutes and 8 seconds! And the angle of diamond crystal is exactly 54 degrees, 44 minutes and 8 seconds! Is it a coincidence or some "tacit understanding" of nature?

Spider's "gossip" net is a complex and beautiful octagonal geometric pattern, and it is difficult for people to draw a symmetrical pattern like a spider even with rulers and compasses.

In winter, when a cat sleeps, it always hugs its body into a ball. There is also mathematics in it, because the shape of the ball minimizes the surface area of the body, so it emits the least heat.

The real "genius" of mathematics is coral. Coral writes a "calendar" on its body, and "draws" 365 stripes on its wall every year, apparently one a day. Strangely, paleontologists found that corals 350 million years ago "painted" 400 watercolors every year. Astronomers tell us that at that time, the earth only had 2 1.9 hours a day, not 365 days a year, but 400 days.

The origin of Arabic numerals

Xiaoming is a child who likes to ask questions. One day, he became interested in the numbers 0-9: Why is it called "Arabic numerals"?

So he asked his mother, who was a math teacher, "Since 0-9 is called Arabic numerals, it must have been invented by Arabs?"

Mom shook her head and said, "Arabic numerals were actually invented by Indians." About 1500 years ago, Indians used a special word to represent numbers. There are 10 words, and you can write both strokes. Later, due to contacts between countries, these figures were introduced into Arabia. Arabs thought they were very simple, so they began to use them widely in their own countries and spread throughout Europe. In this way, they gradually became the numbers we use today. Because Arabs have played a great role in the spread of this number, people are used to calling this number' Arabic number'. "

Xiao Ming said happily, "So that's it. Mom, can this be called' making a mistake'? " Xiao Ming and his mother both laughed.

Children's song competition

The math school holds a children's song competition, with the elephant teacher as the referee.

The little monkey Congcong was the first to raise his hand. Cong Cong cleared his throat and began to recite: "I can calculate the carry addition, and I can only add it if the number of digits is right." The number of digits should be aligned with the number of digits. When the number of digits exceeds ten, the number of digits should be advanced to ten. Add ten and one to count quickly and accurately. "

As soon as Cong Cong finished speaking, the dog Jia Jia raised his hand and said, "My nursery rhymes are very similar to those of Cong Cong." The elephant teacher said, "Good! Then let's listen to your nursery rhymes. " Jia Jia walked up to the stage and recited: "It is not difficult to abdicate and subtract, and the number alignment can be reduced. If the single digits are small enough, ten people can borrow one. If ten people return, one will be ten, and if they return, one will be missing. How to reduce the ten digits, the ten digits will be reduced again and again. "

Everyone applauded their wonderful performance. Teacher Elephant said, "Their child stars know carry addition and abdication subtraction, so we think they both won the championship, ok?" Everyone agreed with the teacher and applauded happily to congratulate them on putting it away.

Qiao Yanqiao 2014-11-19

When Gauss was in elementary school, once after the teacher taught addition, because the teacher wanted to have a rest, he came up with a topic for students to calculate. The theme is:

1+2+3+ .....+97+98+99+ 100 = ?

The teacher is thinking, now the children must start class! I used this as an excuse to go out, but Gauss stopped me! ! It turns out that Gauss has worked it out. Little friend, do you know how he did it?

Gauss told everyone how he worked it out: add 1 to 100 ... and expand it all.

1 15 1638299 20 14- 1 1- 18

When Gauss was in elementary school, once after the teacher taught addition, because the teacher wanted to have a rest, he came up with a topic for students to calculate. The theme is:

1+2+3+ .....+97+98+99+ 100 = ?

The teacher is thinking, now the children must start class! I used this as an excuse to go out, but Gauss stopped me! ! It turns out that Gauss has worked it out. Little friend, do you know how he did it?

Gauss told everyone how he worked it out: add 1 to 100, and add 100 to 1, adding two lines, that is:

1+2+3+4+ .....+96+97+98+99+ 100

100+99+98+97+96+ .....+4+3+2+ 1

= 10 1+ 10 1+ 10 1+ .....+ 10 1+ 10 1+ 10 1+ 10 1

* * * There are one hundred sums 10 1, but the formula is repeated twice, so the answer is equal to < 5050 & gt.

Since then, the learning process of Gauss Elementary School has already surpassed other students, which laid the foundation for his future mathematics and made him a mathematical genius!

The Mathematical Genius of Animals

Honeycomb is a strictly hexagonal cylinder, with a flat hexagonal opening at one end and a closed hexagonal diamond bottom at the other end, which consists of three identical diamonds. The rhombic obtuse angle of the chassis is 109 degrees 28 minutes, and all acute angles are 70 degrees 32 minutes, which is both firm and material-saving. The honeycomb wall thickness is 0.073 mm, and the error is very small.

Red-crowned cranes always move in groups, and they are arranged in the word "people". The angle of the herringbone is 1 10 degrees. More accurate calculation also shows that the angle of the herringbone is half-that is, the angle between each side and the direction of the crane group is 54 degrees, 44 minutes and 8 seconds! And the angle of diamond crystal is exactly 54 degrees, 44 minutes and 8 seconds! Is it a coincidence or some "tacit understanding" of nature?

Spider's "gossip" net is a complex and beautiful octagonal geometric pattern, and it is difficult for people to draw a symmetrical pattern like a spider even with rulers and compasses.

In winter, when a cat sleeps, it always hugs its body into a ball. There is also mathematics in it, because the shape of the ball minimizes the surface area of the body, so it emits the least heat.

The real "genius" of mathematics is coral. Coral writes a "calendar" on its body, and "draws" 365 stripes on its wall every year, apparently one a day. Strangely, paleontologists found that corals 350 million years ago "painted" 400 watercolors every year. Astronomers tell us that at that time, the earth only had 2 1.9 hours a day, not 365 days a year, but 400 days.

The origin of Arabic numerals

Xiaoming is a child who likes to ask questions. One day, he became interested in the numbers 0-9: Why is it called "Arabic numerals"?

So he asked his mother, who was a math teacher, "Since 0-9 is called Arabic numerals, it must have been invented by Arabs?"

Mom shook her head and said, "Arabic numerals were actually invented by Indians." About 1500 years ago, Indians used a special word to represent numbers. There are 10 words, and you can write both strokes. Later, due to contacts between countries, these figures were introduced into Arabia. Arabs thought they were very simple, so they began to use them widely in their own countries and spread throughout Europe. In this way, they gradually became the numbers we use today. Because Arabs have played a great role in the spread of this number, people are used to calling this number' Arabic number'. "

Xiao Ming said happily, "So that's it. Mom, can this be called' making a mistake'? " Xiao Ming and his mother both laughed.

A said, "I have 1 brother and 3 sisters."

B said, "I have two brothers and two sisters."

C said, "I have three brothers, 1 sister."

In fact, these three people are all brothers and sisters, so how many brothers and sisters are there?

A: 6