Counting 13 dots and writing 13
Let's count these dots together. How many do you see?
Ten dots fill the ten-frame. That's one whole group of ten.
And three more dots on the side. Eleven, twelve, thirteen!
We write thirteen with two digits. First, a one for the group of ten.
Then, a three for the three extra dots.
One, three — thirteen!
Thirteen is one ten and three ones. Now you can write it too!