162 - Written Expressions

Front

What is an expression in mathematics?

Back

An expression is a combination of numbers, variables, and operators (such as +, -, *, /) that represents a value but does not include an equality sign.

Front

What is an equation in mathematics?

Back

An equation is a mathematical statement that asserts the equality of two expressions, typically containing an equality sign (=).

Front

What is the quotient of seven and a number represented as?

Back

7/x, where x is the number.

Front

How is 'ten divided by a number' expressed mathematically?

Back

10/x, where x is the number.

Front

What does 'twenty times a number' mean in mathematical terms?

Back

20x, where x is the number.

Front

How do you express 'twenty decreased by x' in mathematical notation?

Back

20 - x.

Front

What is the difference between an expression and an equation?

Back

An expression does not have an equality sign and represents a value, while an equation states that two expressions are equal.

Front

What does the term 'variable' mean in mathematics?

Back

A variable is a symbol (often a letter) that represents an unknown value in mathematical expressions or equations.

Front

What is the purpose of using parentheses in mathematical expressions?

Back

Parentheses indicate the order of operations, showing which calculations should be performed first.

Front

What is the order of operations in mathematics?

Back

The order of operations is a set of rules that dictates the sequence in which calculations are performed: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right) - often abbreviated as PEMDAS.