1. First grade primary school: introduce the concept of addition.
In the first grade of primary school, students begin to get in touch with the basic concepts of mathematics, including addition. First-year students understand the concept of addition and perform simple addition operations mainly through specific teaching AIDS such as objects, figures and fingers.
2. The second grade of primary school: learning the nature of addition
In the second grade of primary school, students will further study the nature of addition, including additive commutative law. Additive commutative law means that the result of adding two numbers has nothing to do with their order, that is, A+B = B+A. Students understand and apply additive commutative law through practical examples and exercises.
3. The third grade of primary school: consolidating the application of additive commutative law.
In the third grade of primary school, students will further consolidate and apply additive commutative law. They will exercise their ability to use additive commutative law through more complicated mathematical problems, such as solving formulas with multiple addition operations, or simplifying the calculation process with additive commutative law.
4. Extended knowledge: commutative law of other operations
Additive commutative law is one of the basic commutative laws in mathematics, and there are commutative laws in other operations. For example, the commutative law of multiplication means that the result of multiplication of two numbers has nothing to do with their order, that is, A× B = B× A. Except for addition and multiplication, subtraction and division generally have no commutative law.
5. Expand knowledge: expand to a higher grade.
In high school mathematics study, students will further popularize and apply additive commutative law. They will learn more complex mathematical concepts and operations, such as fractions, positive and negative numbers and algebraic expressions, which will involve the application of the law of exchange operations.
Summary:
"additive commutative law" is an important concept in primary school mathematics learning, which is usually introduced into the mathematics curriculum of the second grade of primary school. After that, students will consolidate the application of additive commutative law in the next academic year, and gradually learn the exchange laws of other operations. In senior mathematics learning, students will further promote the application of the law of operational transformation.