This sheet is a sample of a 4 page unit (4 pages of questions & 4 answer keys) on estimating (rounding) then solving word problems. This page has word problems involving addition and subtraction.
Estimation Word Problems
Follow this link to take a peek at the 4 page version. It has estimation for addition, subtraction and multiplication. If you like the free sample I know you will enjoy the 4 page product. Answer keys are included.
Though it is multiple choice I always make my students circle the numbers in the problem then round them and show their work in the space given.
Skills: Estimation, rounding, addition problem solving, subtraction problem solving