Addition: refers to the operation of adding two or more numbers and quantities into one number and quantity. For example: 1+2=3

Subtraction:

The operation of finding the other addend by knowing two addends and one of them. Such as: 3-2= 1

Multiplication:

Multiplication refers to how many times a number or quantity has been increased. For example: 1×3=3 or 1+ 1+ 1=3.

Department:

Knowing the product of two factors and one of them, the operation of finding the other factor is called division. Such as: 3÷3= 1

Additive commutative law: A+B = B+A.

Additive associative law: (a+b)+c=a+(b+c)

Multiplicative commutative law: ab=ba

Law of multiplicative association: (ab)c=a(bc)

Multiplication and distribution law: AC+BC = (a+b) C.

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Although our math books are different, they are almost the same.

I dug up the teacher's notes, hoping to help you.