Digit Dog and Calculating Cat are using one set of digit cards 1 – 10 and looking for pairs that make 10.

Download a set of digit cards here. You will need cards 1 to 10. Print double-sided to have Digit Dog on the back!

Download a baseboard here. Print two.

*How many pairs that make 10 can you make? Put the cards on the baseboard.*

*Can you use all the cards? Which cards are left over? Why?*

Try making some other totals – remember you can only use one set of cards from 1 – 10.

*What if you make 9? Which cards are left over? Why?*

*What about 8? or 12? or 13? or 11? *Investigate the number of pairs and the cards that you cannot use.

Record your work. Write down the pairs of numbers and their totals.