Curated OER
Brain Booster: Subtraction Strategy- Working Backward
In this daily math problem worksheet, students complete three activities that help them use subtraction and work backwards. Students show their work using pictures, numbers, or words and may use cubes, number lines or hundred boards for...
CK-12 Foundation
Ck 12: Algebra: Guess and Check, Work Backward
[Free Registration/Login may be required to access all resource tools.] Learn how to solve problems using guess and check and by working backward.
Annenberg Foundation
Annenberg Learner: Patterns in Mathematics: Mystery Operations
This interactive activity allows you to change an equation's numbers in an attempt to figure out what operations are being used to control the answers.
Other
Math Stories: Working Backwards
At this one page site you can work through step by step a sample problem that illustrates the problem solving strategy for "Working backwards." The answer is right there to help you check your thinking.