Practise Unit 17 (Addition and subtraction) of the Primary 1 maths book. The game makes fresh questions on the unit's lessons every time you play.
Lessons in this unit
- Adding and subtracting tens and numbers to 100
How to revise this unit with games
Start with Practice, which has no timer, until you earn three stars, then try the One-minute race to get faster. The questions change every time, so every round is fresh revision on the same lessons.