1, addend+addend = sum. And-one addend = another addend.

2. Minus-Minus = difference. Negative difference = negative. Difference+subtraction = subtraction.

3. Factor × factor = product. Product-one factor = another factor.

4. Divider = quotient. Dividend quotient = divisor. Quotient × frequency divider = frequency divider.

The corresponding explanations of addition, subtraction, multiplication and division are as follows:

1, addition is one of the four basic operations, which refers to the calculation of combining two or more numbers and quantities into one number and quantity. The symbol of addition is the plus sign "+". Connect items with a plus sign when adding.

2. subtraction is one of the four operations, and the operation of subtracting one number from another is called subtraction; Given the sum of two addends and one of them, the operation of finding the other addend is called subtraction. The symbol of subtraction is "-",which is pronounced as negative sign.

3. Multiplication is a shortcut to add up the same numbers. The result of its operation is called product, and "X" is the symbol of multiplication. From the philosophical point of view, multiplication is the result of qualitative change caused by additive quantity. The multiplication of integers (including negative numbers), rational numbers (fractions) and real numbers is a systematic summary of this basic definition.

The division of two numbers is also called the ratio of two numbers. If ab=c(b≠0), the operation of finding another factor A by multiplying the product C and the factor B is division, which is marked as c÷b and pronounced as C divided by B (or B divided by C). Among them, c is called dividend, b is called divisor, and the result of a operation is called quotient.

Extended data:

Matters needing attention in four operations of addition, subtraction, multiplication and division;

1. If there is only addition and subtraction or only multiplication and division, it is calculated from left to right.

2. If primary operation and secondary operation exist at the same time, the secondary operation is calculated first.

3. If there are primary, secondary and tertiary operations (i.e. power, root and logarithm operations) at the same time, first calculate the tertiary operation, and then calculate the other two levels.

4. If there are brackets, count the numbers in brackets first (no matter what level, count first).

References:

Baidu encyclopedia-four operations