Related Facts
Big facts from small facts
If you know a small fact, you know a bigger one too! 3 – 1 = 2 helps with 13 – 1 = 12.
7 − 3 = 4
helps with
17 − 3 = 14
Related facts connect small and big numbers. If 7 − 3 = 4, then 17 − 3 = 14 (just ten more). Knowing your facts to 10 gives you loads of facts to 20 for free!