1 and sum refer to new things obtained by adding two or more things with the same attributes, and can also be narrowly understood as the result of adding two numbers.

2. Difference, a mathematical term, refers to the result of subtracting two numbers. A mathematical operation, especially the result of subtracting two numbers. For example: 3-2= 1, read: the difference between 3 and 2 is 1.

3. Quotient, the formula is: (Dividend-Remainder) Divider = Quotient, which is a mathematical term.

4. Product is a mathematical term, which generally refers to the result of "multiplication".

Four operations refer to four operations: addition, subtraction, multiplication and division. Four operations are the important content of primary school mathematics and the basis of learning other related knowledge.

Addition: the operation of combining two numbers into one number.

Subtraction: when two addends and one of them are known, the operation of finding the other addend.

Multiplication: the operation of finding the product of two numbers.

(1) Multiplying a number with an integer is a simple operation, and you can find the sum of several identical addends.

(2) Multiply a number by a decimal to find a few tenths, a few percent and a few thousandths of this number.

(3) A number multiplied by a fraction is a fraction of this number.

Division: the operation of finding another factor by knowing the product of two factors and one of them.

Multiplication is a simple operation of addition and division is a simple operation of subtraction.

Subtraction is the inverse of addition and division is the inverse of multiplication.

Appendix+Appendix = sum.

Minus-Minus = difference.

One addend = and-the other addend.

Subtraction = minuend-difference.

Subtraction = difference+subtraction.

Factor × factor = product.

One factor = product ÷ another factor.

Dividend = quotient.

Divider = dividend quotient.

Dividend = quotient × divisor.