In order to simplify the expression 3-5 with color counters, which of the following would need to be added to the work mat?
A) 2 yellow and 2 red counters.
B) 3 yellow and 3 red counters.
C) 5 yellow and 5 red counters.
D) 3 yellow and 2 red counters.
E) 2 yellow and 3 red counters.
Correct Answer:
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