This document provides 20 addition problems with numbers within 18. The problems progress from single digit additions like 6 + 6 to double digit additions such as 15 + 3. Students are expected to solve the addition problems without carrying or regrouping.

1. Skill Set 6 : Addition within 18
1) 6 + 6 = 11) 10 + 0 =
2) 7 + 5 = 12) 12 + 6 =
3) 8 + 4 = 13) 14 + 4 =
4) 9 + 3 = 14) 15 + 3 =
5) 8 + 2 = 15) 13 + 5 =
6) 7 + 7 = 16) 12 + 3 =
7) 6 + 5 = 17) 11 + 7 =
8) 9 + 4 = 18) 15 + 3 =
9) 7 + 6 = 19) 17 + 1 =
10) 6 + 5 = 20) 16 + 2 =