These printable worksheets include 2-digit plus 1-digit numbers and 2-digit addition drills. They also contain addition with or without words problems, addition with regrouping or no regrouping, missing figures, addition with regrouping or carrying, and adding 3, 4, and 5 additional digits. You will also find 2-digit innovative addition worksheets. These include base ten blocks and dart-board addition. These PDF worksheets have been carefully designed for both 1st- and 2nd-grade practice. Use our worksheets to kickstart your learning!