2. Learn to write application questions according to pictures and formulas.
3, increase oral expression ability and flexibility of thinking, like mathematics.
4. Interested in participating in math activities.
5. Understand the application of numbers in daily life, and preliminarily understand the relationship between numbers and people's lives.
Activity preparation: farmers' uncles, carrots and rabbits; Some formula cards; A question mark; ppt .
Activity flow: 1. Warm-up activity: Clap your hands.
T: I ask, you answer,
5 can be divided by 1 and what number? (5 can be divided into 1 and 4)
What is the sum of 5 divided by 2? (5 can be divided into 2 and 3)
How much can 5 be divided by 2+? 5 can be divided into 2+3)
Second, eager to introduce: test you.
T: Well, the children are very smart, so the teacher will test everyone to see if the children in Class 7 are really good. Look carefully and listen carefully.
1, story situation1(tShow teaching AIDS while talking):
There were three carrots in the farmer's uncle's garden, and then two carrots grew. Ask the farmer's uncle to help calculate. How many carrots are there in the garden now?
Did the children pay attention to how the teacher asked questions just now? (Emphasize "one * * *")
How many carrots are there?
Test questions:
How did you know? How to calculate? Yang: 3+2=5.
Why did you choose addition? Young: because there are two more, the number has increased, so we use addition.
Teacher, find this formula. Stick 3+2=5 on the blackboard.
2, story situation 2:
There are five carrots in the garden now. The farmer's uncle pulled out a carrot for the rabbit. Ask the farmer's uncle to help calculate. How many carrots are left in the vegetable garden now?
How did the teacher ask questions just now? (Emphasis on "surplus")
How many carrots are left?
Test questions:
How to calculate it? Why did you choose subtraction? 5- 1=4
Why did you choose subtraction? Because I pulled out one for the rabbit, the number became less, so I used subtraction.
Teacher, find this formula. Stick 5- 1=4 on the blackboard.
Test summary:
Like these two short stories just now, the activity of telling one thing, showing two numbers and leaving a question at the end is called compiling application questions. Can you all make up application problems?
Third, look at the pictures to fill in the questions
T: Have you all learned it? Next, let's try it together!
1, show the first picture of ppt, bird picture.
Let's take a look first. What's in the picture? Birds, these two birds seem to have just arrived.
Now I want to make this picture into an application problem. Remember to leave a question for others. (If no one, the teacher first; If you have young children, please have a baby. )
The teacher will edit it. My topic is: there are three birds on the branch, and then two birds fly in. How many birds are there on the branch now?
Let the children answer together. 5。 The formula is 3+2=5.
Finally, how did the teacher ask questions? The teacher used the word "one * * *" here. It seems that we usually use the word "one * * *" to ask questions except questions.
2. Show the second picture of ppt, and cut the picture.
What does the picture say? (Ask a child to answer, edited by the teacher)
There were three clips, and then 1 clip broke. How many magazines are left now?
Finally, how did the teacher ask questions? The teacher used the word "leftover" here. It seems that our subtraction application problems are generally asked with "leftover".
Children, it's time for you to work out application problems. Please choose one of the three pictures and see what's in it. You can make up an application problem.
Show me the third ppt and three pictures of addition application problems.
Three children are invited to speak.
The children are all great. The application problems we just compiled are all addition. I wonder if you can subtract them? Show the fourth ppt, subtraction application problem.
Invite children to speak.
Fourth, formula compilation application questions
T: The children are amazing. They can make up application problems by looking at pictures. Now, let's play in another way. Teacher, here is a formula. Please look at the formula and make up the application questions. You ask, we all answer.
Show me the add-on card. Let the children make up.
Show me the subtraction card. Let the children make up.
Children must make up application questions that are different from others! Let's see who has the fastest little brain.
I'll supply you with the calculation, and everyone will have a title card.