Count on
Start at 7 and count on three: 8, 9, 10.
7 + 3
Each problem adds two one-digit numbers, 0 through 9. Answers can be 0 through 18.
0 to 18 Smallest: 0 + 0 = 0
Largest: 9 + 9 = 18
Typical level: Early elementaryIn the U.S. Common Core, Grade 1 includes addition within 20 and fluency within 10. Curriculum timing varies.
Start at 7 and count on three: 8, 9, 10.
7 + 3
Break apart 6 so 8 can first become 10.
8 + 6
Split 6 into 2 and 4.
8 + 2 makes 10.
If 6 + 6 = 12 is known, then 6 + 7 is one more.
6 + 7
7 is 6 and one more.
6 + 6 = 12 is a known double.
Ask: “Is there an easier one you already know?”
If 8 + 8 = 16 is familiar, then 8 + 7 is one less: 15. Counting on, making 10, and starting from an addition you already know are all useful strategies.