Deriving Facts to 100

What this topic covers

• Use a fact to 10 to add and subtract tens (3 + 4 → 30 + 40).
• Use a fact to 20 to derive facts with tens (8 + 5 → 80 + 50).
• Explain the pattern: the same digits, ten times bigger.

Core concept summaries

Practice formats pupils may meet

NeurofiED uses varied practice to help pupils apply the idea actively, check understanding and build confidence over time.