Why is knowing how to subitize important? It's attaches the quantity of a number to the numeral, and it's the perfect way to transition into addition. Subitizing goes hand in hand with counting on (starting at a number and counting on, instead of counting from 1 again). Once we acquire these two skills, it's makes adding easy! We can also maneuver dots or objects in our head, which actually leads to regrouping!
For example, one of our student's thought process for adding these was:
"I know that's 9, if I move 1 dot over here, it makes 10, which is 10 and 1, which I know is 11!".
Watch one of our students perfect their subitizing skills below!
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