Subtraction within 20
Taking away from bigger numbers
Now we take away from numbers up to 20. Same skills, bigger numbers!
15 take away 6 leaves 9
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15 − 6 = 9
Taking away to 20 works the same way. 15 − 6 = 9. A good trick: take away to 10 first! 15 − 5 = 10, then − 1 more = 9. Using 10 helps with bigger take-aways.