Adding to 9

Adding to 9 is the easiest make-a-ten because 9 only needs 1 more to become 10. Whatever number you are adding, just subtract 1 from it and put a 1 in the tens place. 9+4: take 1 from the 4 (leaving 3), make 10, answer is 13. 9+7: take 1 from 7 (leaving 6), make 10, answer is 16.