This worksheet is about working out the difference of two squares numbers.
We use the fact that a2 - b2 factorises to (a + b) (a - b)
Using this fact, we can work out:
152 - 82 = (15+8)×(15-8) = 23×7 = 161
In this worksheet, students practise using the difference of two squares.
Key stage: KS 3
Curriculum topic: Number
Curriculum subtopic: Understand Integer Powers/Real Roots
Difficulty level: 
