What are the subtraction laws and subtraction formulas?

The laws of subtraction operations include commutative and associative laws.

The operator symbols in refer to: addition, subtraction, multiplication, division, multiplication, opening and other operation symbols.

Addition and subtraction are basically the same kind, so the operation law of addition is also subtraction.

The arithmetic laws are: commutative law, associative law.

Subtraction formulas have subtraction formulas: subtracted subtraction difference subtraction difference subtraction.

Subtraction is a four-rule operation.

The operation of subtracting another number from one number is called subtraction; The sum of two additions is known to be the sum of one of the additions, and the operation of finding the other addition is called subtraction. The symbol that represents subtraction is " " which is pronounced as a minus sign.

The pattern that subtraction follows.

It is anti-commutative, meaning that changing the order changes the symbol of the answer. It is not binding, that is, when a meiotic dissolves more than two numbers, the order of subtraction is important. Subtracting 0 does not change a number.

Subtraction also follows the rules of referencing for related operations such as addition and multiplication. All of these rules can be proven by chaining, starting with the subtraction of integers and generalizing through real numbers and other things. Continuing these modes of general binary operations is prepared in abstract algebra.

Learning.

The subtraction formula is difference = subtracted number - subtracted number. Subtraction is one of the basic operations in mathematics, it is known that two numbers A and B, if there is a number C, which can satisfy B+C=A, then C is called the difference between A and B (and the difference is unique), the operation to find the difference between two numbers is called subtraction, denoted as a-b=c, read as a minus b equals c, a is called the subtracted number, b is called the minus number, the sign "-" is called the minus sign, and subtraction is the inverse operation of addition.

Properties: 1. The subtraction of rational numbers, the operation of decimal number subtraction and large number can not be directly subtracted as in primary school, but it is converted into addition, and calculated with the help of addition, the key is to correctly convert subtraction into addition, and then calculate according to the addition law and operation law of rational numbers.

2. When the subtraction operation of rational numbers fails to be converted into an addition operation, the positions of the subtracted number and the subtraction number cannot be exchanged, because there is no commutative law for subtraction.

3. The subtraction of natural numbers is not closed. It can be closed unless the subtraction is greater than the subtraction.

The law of subtraction: subtraction combined: subtract two numbers from a number in a row, you can add the last two numbers first, and then phase each other.

minus, formula: a-b-c=a-(b+c).

Example: 12-1-3=12-(1+3).

1. The meaning of subtraction: The operation of subtracting another quantity from one quantity is called subtraction.

Second, the nature of subtraction jujube pin coarse:

1. Subtracting a number is equal to adding the opposite of the number. a-b=a+(-b)

2. Subtracting a number plus adding a number is equal to subtracting the difference between the two numbers. a-b+c=a-(b-c)

Extended Materials. 1. The law of operation of addition.

1. The commutative law of addition.

Add two numbers, swap the position of the additive, and the unchanged. a+b=b+a

2. Associative law of addition.

Add three numbers, add the first two numbers first, or add the last two numbers first, and the sum is unchanged. (a+b)+c=a+(b+c)

Second, the law of multiplication and operation.

1. Multiplicative commutative law.

The two numbers are multiplied, and the position of the exchange factor is constant. ab=ba

2. Multiplication and associative law.

When three numbers are multiplied, you can multiply the first two numbers first, or multiply the last two numbers first, and the product remains the same. (ab)c=a(bc)

What are the laws of operation of subtraction?

The nature of subtraction (since subtraction does not have a clear law of operation, the property is its law):

Subtract a number, and so on is contained in the inverse number of the acacia who adds this number. a-b = a+(-b) subtracting two numbers in a row is equal to subtracting the sum of these two laughing numbers. a-b-c=a-(b+c) minus a number plus a number equals subtracting the difference between the two numbers.

a-b+c=a+(c-b)

The subtraction of two numbers from a number is equal to the sum of the two minuses minus this number.