Writing Expressions

Front

What is an expression?

Back

An expression is a combination of numbers, variables, and operators (such as +, -, *, /) that represents a value.

Front

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

Back

It means to take one part of three equal parts of that number, represented as (1/3)n.

Front

How do you express 'increased by' in an expression?

Back

'Increased by' indicates addition. For example, 'a number increased by 2' is expressed as n + 2.

Front

What does 'twice a number' mean?

Back

It means to multiply the number by 2, represented as 2n.

Front

How do you express '3 more than twice a number'?

Back

It is expressed as 2n + 3.

Front

What does 'the difference of' indicate in an expression?

Back

'The difference of' indicates subtraction. For example, 'the difference of 4 and a number' is expressed as 4 - n.

Front

How do you express 'the difference of half a number and 10'?

Back

It is expressed as (1/2)n - 10.

Front

What does '10 more than' mean in an expression?

Back

It indicates addition. For example, '10 more than a number' is expressed as n + 10.

Front

How do you express 'the sum of a number and 5'?

Back

It is expressed as n + 5.

Front

What does 'decreased by' mean in an expression?

Back

'Decreased by' indicates subtraction. For example, 'a number decreased by 3' is expressed as n - 3.