Step 8 Objective

Add and subtract fractions by writing them with a common denominator

Examples of what pupils should know and be able to do

 

Probing questions

Why are equivalent fractions important when adding or subtracting fractions?
What strategies do you use to find a common denominator when adding or subtracting fractions?
Is there only one possible common denominator?
What happens if you use a different common denominator?

What if pupils find this a barrier?

Pupils may find it difficult to write fractions with a common denominator, refer back to step 5.