Subitising cards 0 to 20 with dots on reverse, 1 more, 2 less etc and a blank

These cards are designed to give students quick practise on numbers 0-20 (or whatever range you are working with). Print and laminate so you or your students can use with each other/class maybe as exit ticket or warm-up. They are designed to fold in half whether you cut them out or not. If you photocopy each set onto different coloured paper you can have multiple sets.
There are prompts so that if you want to do more than recognise the number, you can put up the card that says 10 more or double… or use the blank to make up your own.
If you look at the card the right way up, it will be the right way up for the person on the other side.
Dots are coloured or in black.
No computers required :)

8/10/18 realised in coloured cards, 15 wasn’t coloured correctly so I have updated.