2-min Fluency Warm-up — Doubles! Say them fast.
6 + 6 =
7 + 7 =
8 + 8 =
9 + 9 =
A near double is a double plus 1. Example: 6 + 7 = 6 + 6 + 1 = 13.
6 + 7 =
Double: 6 + 6 = , then + 1 =
7 + 8 =
Double: 7 + 7 = , then + 1 =
8 + 9 =
Double: 8 + 8 = , then + 1 =
5 + 6 =
Double: 5 + 5 = , then + 1 =
Read carefully. Think about what is happening. Draw if it helps!
Maya found 8 shells at the beach in the morning. After lunch she found 7 more shells near the rocks. How many shells did Maya find in all?
Draw or write your thinking:
shells
There were 9 birds sitting on the fence. Then 5 more birds landed next to them. How many birds are on the fence now?
Draw or write your thinking:
birds
One of these has a mistake. Find it, explain the error, and fix it.
9 + 6 = 14
✓ or ✗?
Explain:
Correct answer:
7 + 7 = 14
✓ or ✗?
Explain:
Correct answer:
Create Your Own
Make an addition fact with a sum between 11 and 20. Solve it two different ways.
+ =
Way 1 (make 10 or doubles):
Way 2 (a different strategy):