Q: Miss Davis gave 15 popsicle sticks to each of the 10 groups in her class. How many sticks does she have left if she had 170 popsicle sticks?
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A: Miss Davis gave a total of 15 x 10 = <<15*10=150>>150 popsicle sticks to the 10 groups in her class.
So, she is left with 170 - 150 = <<170-150=20>>20 sticks. The answer is  20.
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