One day, two puppies each got a bone. They are very happy and really want to have a good meal. They took them home and saw that their mother had not come back yet. They think that when we are young, we depend on our mother to support us. No matter how cold and hot the weather is, mom will go out and find us food and feed us so much. Now we have something delicious to eat for our mother.
Brother dog said, "Well, let's put them together and keep them for mom." Two bones-just piled up. Brother Dog said, "It turns out that two plus one is like this. Let's call it "+"." Mom will be back soon. I'm so happy to hear that the puppy brothers said they would honor their mother and praised her as a sensible good boy.
Just then, I heard a groan outside the door. When I saw that it was a dog, my grandfather was hungry. My mother said, "Look at poor grandpa, let's give him one to eat." The dog said, "well, give one to grandpa." Take one, leaving only one bone. It looks like "-". Brother puppy said, "Hey, this is what it looks like after subtracting one. Let's call it "-" Mom said, "If you two are lying in a row and look like" = ",it's called an equal sign, and the figure will be clear.
Little monkey buys apples. Little monkey wants to buy eight apples for grandma. When he came to the market, he saw that the red apple was attractive and the green apple was good, so he bought some of the two apples. Five red apples and several green apples? )
The little monkey walked happily to grandma's house with a box containing eight apples. On the way, I bumped into a pig and knocked off an apple. They don't know. How many apples are left at this time? )
Piggy is a good friend of little monkey. It's good to see a little monkey. When the pig said he was thirsty, the little monkey gave him an apple to quench his thirst. How many apples are left at this time? )
Seeing the pig eating the apple with relish, the little monkey wanted to eat it too, so he took an apple and ate it. How many apples are left at this time? )
Suddenly, there was a lion's roar behind him: roar is not good, the lion saw the little monkey, run! The little monkey ran hard with the box and the apples in the box fell out.
Finally, I ran to grandma's house, but the lion didn't catch up. The little monkey finally breathed a sigh of relief. The little monkey gave the apple to grandma, but it looked into the box and said, huh? Why are there only two apples left?
Grandma laughed when the little monkey told her what happened on the road. Grandma said to the little monkey, you are the best gift!
The Clever Boy Once upon a time, there was a king who often amused the ministers around him with difficult questions. If the ministers do it right, he will give them a little reward with a little kindness. If you can't answer, you will be punished or even beheaded.
One day, the king pointed to a pond in the palace and asked, "I will give jewels to anyone who can tell how many buckets of water there are in the pond." If you can't say it, I will' reward' each of you with 50 whips. "Ministers were stumped by this sudden question.
Just as the ministers were in confusion, a little boy came over to herd cattle. He asked what happened and said, "I want to meet this king."
The ministers brought the little boy before the king. Seeing the little boy in front of him was black, thin and small, the king said doubtfully, "If you can't answer this question, you will be beheaded, you know?" Everyone present made a sweat for the little boy, but the little boy answered the king's question unhurriedly. In desperation, the king gave the little boy a gem award. Children, do you know what he answered?
In fact, the king is a problem of insufficient conditions. It is impossible to find the right answer in normal thinking mode. The little boy just caught the key. He replied like this: "it depends on the size of the bucket: if the bucket is as big as the pond, it is a bucket of water;" If the bucket is only half the size of the pond, there are two buckets of water; If the bucket is one-third the size of the pond, that's three buckets of water ... "
The little boy actually broke the habitual thinking mode, and the specific problems were analyzed. How clever and flexible his mind is!
The above is an interesting math story I compiled for you. I hope it helps you.