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  1. Maths
  2. Year 8
  3. Algebra: Expressions
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Substituting Negative Numbers

In this worksheet, students substitute negative numbers into algebraic expressions.

'Substituting Negative Numbers' worksheet

Key stage:  KS 3

Curriculum topic:   Algebra

Curriculum subtopic:   Understand Expressions, Equations, Inequalities, Terms and Factors

Difficulty level:  

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Worksheet Overview

In this worksheet, we will learn how to substitute negative numbers.

 

Substitute the negative numbers into the expressions instead of the letter.


Example

Evaluate
2x+3
4x
   when X = -5  

leaving your answer as a fraction.    

 

Answer

2x(-5)+3
4x(-5)
=
-10+3
-20
=
-7
-20
=
7
20
 


 

Remember: Multiplying or dividing two negative numbers gives a positive answer.

Multiplying or dividing one positive and one negative number, gives a negative answer.

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