🔢 Mathematics · Addition & Subtraction
Mental addition and subtraction (age 6+)
Add and subtract a two-digit number and ones mentally and using concrete/pictorial representations
Typical age: 6–7 years
“Can your child work out '36 + 7' or '42 − 5' in their head — keeping the tens in place and only adjusting the ones?”
0 / 3 mastered