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 Interactive Checkpoint
 Least Common Denominator (LCD):  The least common multiple of the denominators of two or more fractions.

Answer the following questions about the least common denominator:
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 Graded Response

a) What is the least common denominator used to determine the sum 3/8 + 5/12 ?

 

a)
b) 3/10 is added to a fraction so that the least common denominator is 30. What is a possible denominator of the unknown fraction ? b)