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 Interactive Checkpoint
 Sum:   The number you get by adding two or more numbers together.

Answer the following questions about sums.

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Graded Response

 a) What is the sum of 7 and 2?  a)
 b) The term sum uses which arithmetic operation?  b)
 c) The sum of two numbers is twice their difference. If the smaller number is 2, what is the larger number?  c)