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Finding Missing Numbers

One Number Missing

If two numbers in a row are filled in and you know the magic sum is 15, you can find the missing number! Row has 2, 7, and a blank. Add the two you know: 2 + 7 = 9. Subtract from 15: 15 - 9 = 6. The missing number is 6!

Finding Missing Numbers

One Number Missing

If two numbers in a row are filled in and you know the magic sum is 15, you can find the missing number! Row has 2, 7, and a blank. Add the two you know: 2 + 7 = 9. Subtract from 15: 15 - 9 = 6. The missing number is 6!