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🔢 Mathematics · Addition & Subtraction

Adding two two-digit numbers

Add and subtract two two-digit numbers using concrete objects, pictorial representations, and mental methods

Typical age: 6–7 years

“Can your child add or subtract two two-digit numbers — like '43 + 28' — using counters, a drawing, or working it out in their head?”

0 / 3 mastered

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Needs first

Mental addition and subtraction (age 6+)REQUIRED
Adding two two-digit numbers requires ability to add ones to a two-digit number
Adding and subtracting tens mentallyREQUIRED
Adding two two-digit numbers requires ability to add tens to a two-digit number

Unlocks next

Mental and written addition and subtractionREQUIRED
Solving real problems with mental/written methods requires the procedural skill of adding/subtracting two-digit numbers