1, understand the concepts of total number and partial number and their relationship with you through children's hands-on operation.
2. On the basis of learning addition and subtraction within 10, children can add and subtract the fill-in-the-blank questions in the formula within 10 through writing practice.
Activities to be prepared
Baskets with teaching AIDS and balls; fruit basket
Learning tools each have a small animal card package; One box of plasticine per person; Everyone has a pencil and a math exercise book.
Activity process
First of all, the teacher shows the small basket with the ball and asks the children to talk about what is in the basket, how many are there, and what are the similarities and differences. Guide the children to say the total number, and then let them classify the fruits, saying that some of them are big balls and there are four; Some are small balls, and there are two. Let children understand the concepts of whole and part, and list 4+2 = 62+4 = 66-4 = 26-2 = 4.
Second, the teacher shows a small basket full of fruits. Let the children talk about what is in the basket, how many are there, and what are the similarities and differences. The child says the total number, and then asks the child to classify the fruits, saying that there are 7 apples among them; Part of them are pears, and there are three. Further let the children understand the concepts of whole and part, and list the addition and subtraction formulas. Such as 7+3 =103+7 =1010-7 = 310-3 = 7.
Third, guide children to do corresponding oral exercises.
① 7 + 3 = 10
Apple is seven pears, but there are three, and the total is 10.
This is the partial number and the partial number, and this is the total.
Similarly, 3+7 = 104+2 = 2+4 = 6 leads children to tell which is the partial number. What's the total? How many parts are there? How many are there altogether?
② 10 -3 = 7
The fruit has 10 apples, 3 pears and 7 pears.
This is the total, this is a partial number, and it is also a partial number.
Similarly, 10-7 = 364 = 26-2 = 4 leads children to tell which is the total. What is a partial number? How many parts are there? How many are there altogether?
Fourth, guide children to say key sentences. .
(1) In the addition formula, the total number is at the end, and the rest are partial numbers; In the subtraction formula, the total comes first, and the others are partial numbers.
It is concluded that the total sum of addition is at the end and the total sum of subtraction is at the front.
(2) The sum of part number and part number is the total. If you remove some numbers from the total, the rest are still some numbers.
It is concluded that the total demand is the sum of parts; Find a partial number and subtract another from the total.
Five, children play cards. Children take out cards, pour out small animal cards, talk about what they have, how many in total, classify them and make records. Tell your partner the results of your own classification records.
Sixth, children play with plasticine. The rule is that everyone can write two kinds of articles, no matter how many. 10 minutes later, let the children say how many things they have pinched, what is one part and how much, what is the other part and how much. Take notes and tell me which is the total and which is the partial number.
Seven, children know brackets; Written exercises; Teacher tour refers to.
3+=4 5+=7 +2=5 +6= 10
7-=3 -2=8 5-= 1 -3=6
Eight, the teacher summed up the results of checking the children's exercises.
Activity reflection
I tried this activity class three times, constantly reflecting on what mistakes I made in my activities with children, and gradually improving.
The first time I tried teaching, the effect of the activity was not very good. I found that children have a good understanding of the total, but it is a bit difficult to understand the partial number. Children can never associate some objects with some numbers.
In the second trial teaching, I changed the way of guidance, so that when children collectively operate activities, individual guidance inspires children to tell where and how much the total number in their records is. Where is the partial number and what is it? In this activity, it was found that some children left the real thing, and the total number and part number could not be found. So I made some fine-tuning on the basis of last time, so that children can combine intuitive learning tools with abstract theories. In this way, the activity effect is very good.
The third trial teaching achieved remarkable results.
Summarize three mathematical education activities.