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 Interactive Checkpoint
 Common Denominator:  A whole number that is a common multiple of the denominators of two or more fractions.

Answer the following questions about common denominators: Enter each answer in the left column followed by pressing tab  Graded Response
a) What is the least common denominator that can be used when you try to add 3/7 + 2/5? a)
b) What is 3/7 + 2/5 ? Leave your answer as a reduced fraction. b)