A great review and critical thinking sorting activity in which the students sort the number sentences into the True or False category. There is a sheet for addition, subtraction, and mixed. Great for basic facts review, introduction to adding/subtracting bigger numbers, morning work, substitute time fillers, etc. 3 activity sheets are included for that can be used at different times. Also check out my Winter Addition, Subtraction and Multiplication practice packs and Winter Addition, Subtraction and Mixed Facts True/False Sorting Worksheets.