Counting On to 20

Add a small number to a teen number by counting on.

Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.

What children learn in Level 23

Counting on works with bigger numbers too! 14 plus 3: start at 14, count on 3: 15, 16, 17.
Your turn! Start at 16, and tap the number line to count on 2.
For 2 plus 15, start at the bigger number, 15. Count on 2: 16, 17.
Your turn! Start at 18, and count on 2. You'll land on 20!
Big number first, then count on the small number.

Georgia's K-12 Mathematics Standards:

1.NR.2.1 — Use a variety of strategies to solve addition and subtraction problems within 20.