Subtraction with Two-Color Counters

Subtraction can be thought of as taking one quantity from another. To subtract 5 - 3, place 5 counters and then remove 3 of them. There are 2 counters remaining, so 5 - 3 = 2. The subtraction 5 - 3 can also be modeled by placing 5 yellow counters, flipping 3 of them to red, and counting how many yellow counters remain. Part-part-whole models can be used to model subtraction. Subtracting 5 - 3 is like finding a missing part where the whole is 5 and the other part is 3.



Subtraction using the Brainingcamp Two-Color Counters virtual manipulative.

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