Interesting math in the first grade

In fact, mathematics is a very interesting subject. The following is my collection of interesting first-year mathematics for everyone to learn.

Interesting Mathematics in Senior One (1)

The hen hatched four chicks. She was happy and worried. Happily, all four chicks are jumping, which is really pleasing; The worry is that the bad fox will steal the chicken.

In order to prevent the bad fox from stealing chickens, the hen found many boards and sticks and built a flat-topped cabin. Mother hen thinks that she is not afraid of bad foxes when she has a house.

Late at night, the fields were quiet. In the moonlight, a black shadow quickly ran near the cabin.

? Bang, bang! ? The knock at the door woke the hen. ? Who is it? Asked the hen.

? It's me. It's my husband's chicken. Open the door. ? A very ugly voice is answering.

The hen thinks: No! Husband's chicken is out of town, and it will take many days to come back. Besides, this ugly voice is not the voice of the husband chicken at all. Mother hen said loudly: You are not a husband chicken, you are a bad fox, go away quickly! ?

When a bad fox can't be fooled, he shows his ferocious face. He snapped:? Give me the chicken! Otherwise, I will tear down your house and eat you all! ?

Although the hen was afraid, he said? No, no, no. My baby chicken can't be eaten for you. ?

The bad fox flew into a rage and shook the flat-topped wooden house hard, and all four chickens were scared to hide under their wings. After shaking for a while, the frame of the house tilted. There was a big crack between the roof and the wall. A big fox's paw came in and caught a chick and ran away.

At dawn, birds fly around looking for food. A cry alarmed them.

Little yellowbird asked? Hen, why are you crying?

The hen cried and said, I built a flat-topped wooden house to prevent bad foxes from stealing chickens. Who knows that the flat-topped wooden house is not strong, so the bad fox pushed it three times and two times. The bad fox grabbed a chicken, wow!

The woodpecker said, Little Magpie knows how to build a house, so please ask him to help you build a strong house! ?

After a while, the woodpecker invited the magpie. The magpie said, I can only build nests, where can I build a house? ?

? then what Everyone is worried.

Magpie said, once I was in a big tree, I heard several construction workers say that the triangular roof is the strongest. ?

The woodpecker said anxiously, who has seen a triangle?

The magpie made a triangle from three branches.

Everyone said:? Let's make it like this. ?

Some birds are holding branches, some are holding mud, woodpeckers are pecking holes in the wood, and magpies are tying up all the wood with twigs. When the sun went down, a new house with a triangular roof was built.

In the evening, the bad fox came again. This time, he said nothing and shook the wooden house desperately. Strange, why can't this wooden house shake tonight? ! The bad fox shook it again with all his strength, but it still did not move.

It's almost dawn, and the bad fox said sternly, even if I spare you now, I'll come again tomorrow. If you dare come out, I will eat you! ?

Early in the morning, the bird saw the hen worried about guarding the cabin again.

Shan Ying asked? Mother hen, your cabin is very good. What are you worried about?

Mother hen said? Triangular roofs are safer, but we can't always stay in the house! The bad fox said that he would catch the chicken as soon as we came out. ?

The lark said, I have a good idea. Let's help mother hen put a wooden fence around the house and install a wooden fence door for easy access, so that we can guard against bad foxes! ?

Everyone said it was a good idea, so they started to build a wooden fence together. They also sharpened the top to prevent bad foxes from jumping in. Finally, install a rectangular wooden fence door.

At night, the bad fox really came again. He saw the baby chicken jumping around in the fence, drooling. The bad fox turned around the wooden fence twice and found that it was the easiest to break the fence door. He shook the wooden fence door with two claws. As a result, the rectangular door became a parallelogram, revealing a gap. Bad fox? Hey? Suddenly jumped in. If the hen doesn't bring the chick to the house quickly, I'm afraid it will be a disaster.

The bad fox is gone. The little magpie flew in and said, rectangular doors are easy to deform. If you nail a board obliquely and turn it into two triangles, it will be much stronger. ?

The lark said, we can't always guard against bad foxes, can we? Let's get started. ? Everyone was very happy and busy for a while before leaving.

The bad fox came quietly again without eating the chicks. He went straight to the wooden fence door and shook it vigorously. Hey, why can't you shake it this time? The fox shook it with all his strength, just listening? Plop? Fell into the trap with a bang. The bottom of the trap was covered with triangular spikes, and the sly fox died.

The hen said happily? Triangle is really useful! ?

Interesting Mathematics in Senior One (2)

In the palace of mathematics, there are two families: number and shape. Sometimes they quarrel, but more often they help each other. One day, the big cube took a few small cubes to several families to play. As soon as I entered the door, I found that several younger brothers in several houses were unhappy. Ask politely: What's the matter? Don't be naughty today! ? The number three scrambled to answer:? I'm worried! Brother Xing, what do you think of 1+3+5+7+? + 19=? One by one, too much trouble. ? Count to five and say: That's not bad. If I sum a row of n odd numbers, how do I add them up? I can't add it for a lifetime. ?

I saw the big square touching around, thinking about it a little, and said, there is a magic! There is a magical way! According to our shape, we can calculate your number. ? Small number 1 Surprised: How can you find numbers by shapes? You are bluffing! ? Please look! ? The big square replied.

Big Cube slowly asked his little cubes to stand up one by one, drew a few lines on them and wrote down the numbers.

The big cube said:? 1 accounts for 1 cell, and 5 accounts for 5 cells. Pick a few odd numbers at random and calculate my area. ?

Interesting Mathematics in Senior One (3)

Early in the morning, four children, A, B, C and D, went to the forest to pick mushrooms. At nine o'clock, they are ready to go back. Before leaving the forest, everyone counted the mushrooms in the basket. Four people added up to 72 mushrooms. But half of the mushrooms collected in the armor can be eaten. On the way back, A lost all the poisonous mushrooms. The bottom of B's basket was broken, and two of them were missed. C picked them up and put them in the basket. At this time, the three of them have exactly the same number of mushrooms. Ding picked some more on his way out of the forest, which doubled the number of mushrooms in the basket. When they walked out of the forest, they sat down and counted the mushrooms in the basket. This time, everyone is equal in number.

How many mushrooms do you think are there in each basket when they are going out of the forest? How many mushrooms are there after walking out of the forest?

Interesting Mathematics in Grade One (4)

Winter is coming, and the little squirrel has to prepare food for the winter.

One day, the little squirrel came to the forest with a big bag on his back and said to Grandpa Pine, Would you please give me your pine cone? Grandpa Pine was generous and said: Pick as many as you want. The little squirrel is very happy. He picked it up and sang. Soon the bag will be full. Grandpa Pine asked: How many did you pick? The little squirrel said, Oh, I forgot! Grandpa Pine said with a smile? I planted 16 pinecones and nine more. If you can figure out how much you picked, I'll put it on your back. ? The little pine tree is in a hurry and can't be counted. What shall we do? If Grandpa Pine won't let him take it away, what will he eat in winter? I will help it.

In math class, the teacher said: knowing the total number and finding the partial number is to remove the known partial number from the total number and get another partial number, which is calculated by subtraction. I soon figured it out that the little squirrel picked 16-9=7 (pieces).