I created this worksheet to teach my 2nd grade students how to use a number line to solve subtraction problems. Most of the problems are 2-digit, but on the 2nd side they move into numbers in the 100's. I plan to use the first few problems for guided practice, and to show them how to use addition to subtract by hopping by 10's, then 1's, then let them do some problems independently. They could also hop down/backwards to subtract, but I usually find it easier for the kids to count up from the smaller number to the bigger number. 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!