We have looked at adding 10 lots in class but that was quite a while ago now!
I want you to revise adding and taking away 10.
Use the hundred square and get someone to point to a number and either add or subtract 10 from that number. Try and see how quick you can do it!
You can also click on the link below which will take you to an interactive hundred square where you can use different colours to 'paint the squares' to show your answers.
The more we practice, the better we get!