In the subtraction formula, the number before the minus sign is the minuend, the number after the minus sign is the minuend, and the number after the equal sign is the difference.

Subtraction is the number deducted from the minuend in the subtraction formula, for example, a-b=c, which is pronounced as A minus B equals C, A is called the minuend, and B is called the minuend.

In subtraction, two numbers a and b are known. If a number c satisfies b+c=a, then c is called the difference between a and b (and the difference is unique).

Extended data

Significance of rational number subtraction

The significance of rational number subtraction is the same as that of elementary school subtraction. When two numbers are known and one of them is added to find the other, it is called subtraction. Subtraction is the inverse of addition. In elementary school, the minuend was greater than the subtraction. After introducing negative numbers, any two numbers can be subtracted.

Law of rational number subtraction

Subtracting a number is equal to adding the reciprocal of this number, which can be expressed as:

References:

Baidu encyclopedia-subtraction