Key Idea1 of 3
Take Away from 9
9 - 1 = 8, 9 - 2 = 7, 9 - 3 = 6, 9 - 4 = 5, 9 - 5 = 4. Notice something? 9 - 4 = 5 and 9 - 5 = 4. They are partners!
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Math — Subtraction to 10
9 - 1 = 8, 9 - 2 = 7, 9 - 3 = 6, 9 - 4 = 5, 9 - 5 = 4. Notice something? 9 - 4 = 5 and 9 - 5 = 4. They are partners!