Introducing new math dots cards

Today, i just introduce the math dots cards to my 7.5-month-old son, i watched the video and read the book from Glenn Doman. but i still have question.

Do i need to say “this is…” whenever i introduce the new math dots cards?? for example, “this is 1, this is 2…” for first few days? After 5 days, when i introduce another new cards, again i have to say “this is 11, this is 12…” ??

Can anyone answer me this question? I’m really confused about this.

Thanks!!

You are just supposed to say the number when you show the card, and it is supposed to be flashed very fast.