I can solve a subtraction problem when the change is unknown. Tap button. Read the story problem or click the to listen to me read it to you. Use the tool to move the counters onto the picture if you would like. Use the or tool to record your answer. Use the to tell me how you used addition or subtraction to solve the equation. Do all 3 pages. Click when you are done!
Adapted and extended from Jessica Simbine’s original.