Make Ten (9 plus)
Borrow 1 from the small number to turn 9 into 10, then add the rest
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Make-ten is the key strategy for carrying addition: 9 plus something is hard, so borrow 1 from the small number to complete the ten-frame first, then add what is left to 10. Tap “Move 1 over” to watch a blue dot fill the frame, turning 9 + ? into an easy 10 + ? you can see at a glance.
Nine red dots don't quite fill the ten-frame, with some blue dots beside them. Tap “Move 1 over” and watch a blue dot complete the frame — suddenly 9 + something becomes 10 + the rest, easy to see at a glance.