How to use the rekenrek August13 | Seite 3
Basics How do you know there are 9? 4 more than 5 Or 1 less than 10 Bonds within 10/20 the same as ITZA • www.mrsmaths.co.uk
How to use the rekenrek August13 | Seite 2
How to use the rekenrek August13 | Seite 4