Key Idea1 of 3
One and Nine
Put 1 counter on a ten-frame. How many empty spots remain? Count them: 9! So 1 plus 9 equals 10. Think of it this way: if you ate 1 grape from a bunch of 10, there are 9 left. The pair 1 and 9 always makes 10.
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Mathematics — Ways to Make 10
Put 1 counter on a ten-frame. How many empty spots remain? Count them: 9! So 1 plus 9 equals 10. Think of it this way: if you ate 1 grape from a bunch of 10, there are 9 left. The pair 1 and 9 always makes 10.