Moniquemum,
hi, did u read Glenn Doman's "how to teach your baby math?". it's a good way to use these dots card to let your baby know math and can learn "+/-/x/... formual".
I have not seem the Glenn' book just know this idea from Tina'sbaby website n I did tried it out by writing the words with ball pen and my daughter is very interesting about it.
So now i looking for more materials and think words I can write on the A4 paper but not the dots since quite a lot.