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# Fractioncont

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### Transcript

• 1. Fractions Cont.
• 2. Vocabulary
• Multiple --
• The product of two or more numbers.
• Common Multiples --
• Multiples of one number that are also multiples of another number.
• Least Common Multiple (LCM) --
• The least number that is a common multiple.
• 3. Find the Least Common Multiple. (LCM)
• 2 and 8
• 5 and 6
• 3 and 9
• Direction
• 4. Find the Least Common Multiple.
• 2 and 8 (LCM) = 8
• 5 and 6 (LCM) = 30
• 3 and 9 (LCM) = 9
• 5. Least Common Denominator (LCD)
• Least Common Denominator (LCD): the Least Common Multiple of two or more denominators.
• 6. Find the Least Common Denominator of each group of fractions.
• 1/2 and 1/8
• 2/5 and 2/6
• 1/3 and 5/9
• 7. Find the Least Common Denominator of each group of fractions.
• 1/2 and 1/8; (LCM) = 8
• 1/2 = 4/ 8 and 1/8 = 1/ 8
• 2/5 and 2/6; (LCM) = 30
• 2/5 = 12/ 30 and 2/6 = 10/ 30
• 1/3 and 5/9; (LCM) = 9
• 1/3 = 3/ 9 and 5/9 = 5/ 9
• 8. Comparing
• Decide which is larger.
• 4/25 2/15
• Look at both numbers multiples.
• 25: 25,50, 75 ,100
• 15: 15,30,45,60, 75 ,90
• 9. Comparing
• Decide which is larger.
• 4/25 2/15
• LCM = 75
• 10. Comparing
• Decide which is larger.
• 4/25 2/15
• Change the denominator to the LCM.
• 4 x 3 = 12 2 x 5 = 10
• 25 x 3 = 75 15 x 5 = 75
• 11. Comparing
• Decide which is larger.
• 4/25 > 2/15
• 4/25 is larger
• 12. Comparing
• Decide which is larger.
• 3/4 2/8
• 4/5 5/6
• 5/12 3/9
• 1/5 2/12
• 13. Comparing
• Decide which is larger. Answers
• 3/4;2/8
• LCM = 8 6/8 > 2/8 Answer: 3/4
• 4/5;5/6
• LCM = 30 24/30 < 25/30 Answer: 5/6
• 5/12;3/9
• LCM = 36 15/36 > 12/36 Answer: 5/12
• 1/5;2/12
• LCM = 60 12/60 > 10/60 Answer: 1/5
• 14. Ordering
• Write in order from least to greatest.
• 5/6,3/4,7/12
• 2/3,3/4,2/6
• 1/2,1/5,1/8
• 15. Ordering
• Write in order from least to greatest.
• 5/6,3/4,7/12
• Find the LCM = 12
• 10/12,9/12,7/12
• 16. Ordering
• Write in order from least to greatest.
• 2/3,3/4,2/6
• Find the LCM = 12
• 8/12,9/12,4/12
• 17. Ordering
• Write in order from least to greatest.
• 3. 1/2,1/5,1/8
• Find the product of the denominators.
• 2 x 5 x 8 = 80
• 40/80,16/80,10/80
• 18. Ordering
• Write in order from least to greatest.
• 3. 1/2,1/5,1/8
• List the Prime Factors:
• 2 = 2
• 5 = 5
• 8 = 2 x 2 x 2
• LCD = 2 x 2 x 2 x 5 = 40
• 20/40, 8/40, 5/40
• 19. Changing a Fraction to a Percent
• 1. 1/2
• 2. 3/5
• 3. 1/4
• 20. Changing a Fraction to a Percent--Answer
• 1. 1/2 =
• 2. 3/5 =
• 3. 1/4 =
• 21. Changing a Fraction to a Percent
• Put the percents in order from least to greatest.
• 50%, 60%, 25%
• 22. Changing a Fraction to a Percent -- Answer
• Put the percents in order from least to greatest.
• 50%, 60%, 25%
• 25%
• 50%
• 60%