The multiplication formula (simple multiplication formula) summarizes the multiplication results of some special polynomials and applies them directly. Each letter in the formula can generally represent a number, a single term, a polynomial, and some can be extended to fractions and roots. Multiplication formula is an important content of algebraic expression multiplication. Mastering the multiplication formula accurately and skillfully is of great significance for learning the multiplication of algebraic expressions and even other operations of algebraic expressions. Multiplication formula is the most commonly used and basic formula, from which other formulas can be derived.

Most of these formulas are not only applicable (polynomial multiplication), but also reversible (factorization).

Name of each part of multiplication formula: Multiplier × Multiplier = Product. Multiply two numbers, then both numbers are called multipliers. Arithmetically, the product of multiplying two numbers is the product.

Product number

1. Cumulative number or quantity.

2. refers to the arithmetic multiplication of two numbers.

3. Mathematical product number can be decomposed into odd numbers of products of several prime factors, which is called product number, that is, mathematical odd number. The smallest product is 9.

4. The "product" in demand deposit refers to the sum of the account balances accumulated every day according to the actual number of days. It is usually used to calculate the interest of demand deposits. Interest on current deposit = ∑ (product * daily interest rate).

multiplier

1. Multiply two numbers, then both numbers are called multipliers.

2. Mathematical multiplier refers to the number multiplied by other numbers in the multiplication of four operations, also called factor, which is generally placed behind the formula.

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.

Multiplication can also be seen as calculating the objects arranged in a rectangle (integer) or finding the area of a rectangle with a given side length. The area of the rectangle does not depend on which side is measured first, which shows the exchange property.