This is an exercise in abstract thinking designed to teach and reinforce the concept that the correct sign for the product of positive and negative factors can be determined by the number of negative factors in a problem. To illustrate the concept, we chose to remove digits from this practice sheet and only include the positive and negative symbols. Each leaf shape represents “a problem to be solved” and contains a cluster of positive and negative symbols to represent factors to be multiplied together. Without using digits, students will determine that the product of an even number of negative symbols will always be positive, and the product of an odd number of negative symbols will always be negative. Students will color each leaf shape the correct color based on whether the product would be positive or negative. In our color key, red is positive and blue is negative.
This packet includes the worksheet with the shapes and a color key so students may check their work.
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