Students sort subtraction flash cards according to the subtraction strategy used to determine the difference. Strategies included are counting back,using doubles, think addition, and making tens.
Includes a set of subtraction flashcards through 12-12, 4 sorting cards, 4 subtraction strategy posters, and recording sheets in color and gray scale.
Finding the solution to each subtraction problem may not be the primary goal of this activity.
Determining which strategy best fits the problem is an important skill to learn without being encumbered with the actual computation. Once this skill is mastered, computation can also be completed.