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  1. Maths
  2. Year 8
  3. Algebra: Expressions
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Substitute Negative Numbers into Algebraic Expressions

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

'Substitute Negative Numbers into Algebraic Expressions' worksheet

Key stage:  KS 3

Year:  Year 8 Maths worksheets

Curriculum topic:   Algebra

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

Difficulty level:  

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Worksheet Overview

In this activity, 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

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

 

Multiplying or dividing two negative numbers gives a positive answer.

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

 

Let's have a go at some questions.

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