Finding LCM, LCD, comparing fractions

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What is the Least Common Multiple (LCM)?

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The LCM of two or more numbers is the smallest number that is a multiple of each of the numbers.

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How do you find the LCM of 4 and 6?

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List the multiples: 4: 4, 8, 12, 16, 20... 6: 6, 12, 18, 24... The LCM is 12.

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What is the Least Common Denominator (LCD)?

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The LCD is the smallest number that can be used as a common denominator for two or more fractions.

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The LCD of 4 and 6 is 12.

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What does it mean to compare fractions?

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Comparing fractions involves determining which fraction is greater, less than, or equal to another.

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CCSS.4.NF.A.2

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CCSS.4.NF.A.2

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What is a proper fraction?

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A proper fraction is a fraction where the numerator is less than the denominator.

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CCSS.3.NF.A.1

CCSS.3.NF.A.2B

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What is an improper fraction?

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An improper fraction is a fraction where the numerator is greater than or equal to the denominator.

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CCSS.3.NF.A.1

CCSS.3.NF.A.2B

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What is a mixed number?

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A mixed number is a whole number combined with a proper fraction.

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CCSS.3.NF.A.3C

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