One More, One Less
To 20 — the next and previous number
One more and one less work with bigger numbers too! Let’s go up to 20.
One more than 14
14 → 15
One less than 14
14 → 13
One more than 14 is 15 (count up one). One less than 14 is 13 (count back one). It works exactly the same with teen numbers as with small ones!