I made this workbook as a request from a teacher I work with. I hope it is useful for you, also. Every problem is a 2-step problem. There are also 4 Spiral Reviews throughout the workbook.
Draw a Picture (Add/Sub within 20)
Write a Number Sentence (Add/Sub with/without regrouping)
Bar Models (Add/Sub with/without regrouping)
CC.2.OA.1 Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.
Here are some other problem solving packs that are available in my store.