Teacher Notes
X
Students may use number lines, ten
frames, connecting cubes, and the
100 Chart to verify their answers.
This item practices the addition
facts in
Group C.
- 8 + 2 = 10
- 18 + 2 = 20
- 18 + 3 = 21
- 18 + 4 = 22
8 + 2 = 10. Since 18 = 10 + 8,
18 + 2 is 10 + 8 + 2 or 20.
18 + 3 is one more than that or 21.
18 + 4 is two more than 18 + 2,
or 22.
S. Facts and Patterns 4 
How can you use the top fact to solve the three related facts under it?
- 8 + 2 = ______
- 18 + 2 = ______
- 18 + 3 = ______
- 18 + 4 = ______
