Writing 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.

Front

What does it mean to 'sum' two numbers?

Back

To 'sum' two numbers means to add them together.

Front

What is the product of two numbers?

Back

The product is the result of multiplying two numbers together.

Front

How do you represent 'decreased by' in an expression?

Back

'Decreased by' is represented by subtracting a number from another, e.g., n - 17.

Front

What does 'half of a number' mean in mathematical terms?

Back

'Half of a number' means to divide that number by 2, e.g., c ÷ 2.

Front

How do you express 'triple the sum of x and 5'?

Back

It is expressed as 3(x + 5).

Front

What is the difference between an equation and an expression?

Back

An equation states that two expressions are equal, while an expression does not include an equality sign.

Front

What does 'variable' mean in mathematics?

Back

A variable is a symbol (often a letter) that represents an unknown value.

Front

How do you write 'the sum of 14 and x' in an expression?

Back

It is written as 14 + x.

Front

What does 'product of y and 7' mean?

Back

It means to multiply y by 7, written as y ∙ 7.