The addition and subtraction of 10 is one of the basic contents of children's mathematics learning. The following is a detailed explanation of this topic and teaching suggestions.
First, the concept of 10 plus a few
10 plus several is one of the most basic addition operations in children's mathematics. It means adding 10 to one or more single digits, such as 10+2= 12, 10+3= 13 and so on. Children need to understand that 10 is a special number, and its value is 10, and then they can master the operation of adding a few to 10.
Second, the operation method of adding a few to 10
Calculate 10 plus several numbers.
For example: 10+2= 12, 10+3= 13 and so on.
For larger numbers, it can be divided into two digits and ten digits, and then added separately.
For example, for 23+ 10, we can first split 23 into 20 and 3, and then add 10 to 20 and 3 to get 20+ 10+3=33.
Third, the corresponding concept of subtraction.
After mastering the addition of 10, the corresponding subtraction operation also needs to be learned. For example, after we have mastered 10+2= 12-10 = 2 and12 =10.
Fourth, teaching suggestions
Help children understand the concept of 10 plus a few through objects or pictures. For example, help children understand the meaning of 10+2 by sticking sticks or drawing pictures.
Let the children master the operation method of 10 plus a few through practice. You can let children put sticks or draw pictures to do addition, and encourage them to sum up the rules themselves.
Study in combination with real life. For example, when learning 10+2= 12, children can be reminded that they have 10 sweets, and then they get two sweets, one * * *, and how many sweets are there.
Gradually increase the difficulty, so that children can gradually master the addition and subtraction of larger numbers. For example, you can start with 10+ 1, and then gradually increase the difficulty to 10+9, 10+99 and so on. At the same time, carry and borrow operations can also be introduced.
Stimulate children's interest and enthusiasm in learning through games and competitions. For example, some math games or competitions can be organized to let children learn math knowledge in a relaxed and happy atmosphere.