I created this worksheet to teach my 2nd grade students how to use a number line to solve addition problems. Most of the problems are 2-digit, but on the 2nd side they move into numbers in the 100's (sums and addends). I plan to use the first few problems for guided practice, and to show them how to hop by 10's, then 1's, then let them do some problems independently. I also have strategy sheets available for using base 10 blocks and using a hundreds chart, and sheets where they can choose any strategy they would like, as well as quizzes, mental math practice worksheets, etc. - all available in my TPT store! Thanks!