1 Least Common Multiple & Sixth Grade Least Common Denominator

2 Vocabulary Multiple - The product of a whole number multiplied times any other whole number.

3 How to Find Multiples of A Number

4 Name some multiples of 7:

5 Name some multiples of 6:

6 Name some multiples of 9:

Copyright © 2013 by Monica Yuskaitis 7 How to Find Common Multiples of Two Numbers

Copyright © 2013 by Monica Yuskaitis 8 Vocabulary Common multiple - A number that is a multiple of two or more numbers. Some multiples of 3 & 6 3, 6, 9, 12, 15, 18, 21, 24 6, 12, 18, 24, 30, 36, 42

Copyright © 2013 by Monica Yuskaitis 9 What are some common multiples for 2 & 8? 2 - 2, 4, 8, 10, 12, 14, , 16, 24, 32, 40, 48

Copyright © 2013 by Monica Yuskaitis 10 What are some common multiples for 3 & 7? 3 - 3, 6, 9, 12, 15, 18, , 14, 21, 28, 35

Copyright © 2013 by Monica Yuskaitis 11 How to Find the Least Common Multiple of Two Numbers

Copyright © 2013 by Monica Yuskaitis 12 Vocabulary Least common multiple (LCM) - The smallest common multiple of a set of two or more numbers , 12, 18, 24, 30, , 6, 9, 12, 15, 18

Copyright © 2013 by Monica Yuskaitis 13 What is the least common multiple (LCM) of 3 & 8? 8 - 8, 16, 24, 32, 40, , 6, 9, 12, 15, 21, 24

Copyright © 2013 by Monica Yuskaitis 14 What is the least common multiple (LCM) of 4 & 8? 8 - 8, 16, 24, 32, 40, , 8, 12, 16, 20, 24

Copyright © 2013 by Monica Yuskaitis 15 What is the least common multiple (LCM) of 6 & 8? 8 - 8, 16, 24, 32, 40, , 12, 18, 24, 30, 36

Copyright © 2013 by Monica Yuskaitis 16 What is the least common multiple (LCM) of 4 & 10? , 20, 30, 40, 50, 4 - 4, 8, 12, 16, 20, 24

Copyright © 2013 by Monica Yuskaitis 17 What is the least common multiple (LCM) of 3 & 9? 9 - 9, 18, 27, 36, 45, , 6, 9, 12, 15, 18

Copyright © 2013 by Monica Yuskaitis 18 How to Compare 2 or More Fractions 2 or More Fractions by Finding the CommonDenominator

19 Comparing Fractions Find multiples of each denominator , 10, 15, 20, 25, , 20, 30, 40, Which is larger, 1 5 or 1 10 ?

Copyright © 2013 by Monica Yuskaitis 20 Comparing Fractions Compare the lists of multiples. Circle the common multiples between the two lists , 10, 15, 20, 25, , 20, 30, 40, 50

Copyright © 2013 by Monica Yuskaitis 21 Comparing Fractions Use the least common multiple (LCM) as the denominator , 10, 15,20,25, , 20, 30, 40, 50

Copyright © 2013 by Monica Yuskaitis 22 Comparing Fractions Convert one or both denominators to the LCD of x > 1 10

23 Comparing Fractions Find multiples of each denominator , 6, 9, 12, 15, , 8, 12, 16, 20, Which is larger, 2 3 or 3 4 ?

24 Comparing Fractions 2 - 3,6,9,12,15,18,21, , 8, 12, 16, 20, Compare the lists of multiples. Circle the common multiples between the two lists.

25 Comparing Fractions 2 - 3,6,9,12,15,18,21, , 8, 12, 16, 20, Use the least common multiple (LCM) as the denominator.

Copyright © 2013 by Monica Yuskaitis 26 Comparing Fractions Convert one or both denominators to the LCD of x < 3 4 x 3

27 Comparing Fractions Find multiples of each denominator. 1 4,8,12,16,20,24,28,32,36, , 20, 30, 40, 50, Which is larger, 1 4 or 3 10 ?

28 Comparing Fractions 1 4,8,12,16,20,24,28,32,36, , 20, 30, 40, 50, Compare the lists of multiples. Circle the common multiples between the two lists.

29 Comparing Fractions 1 4,8,12,16,20,24,28,32,36, , 20, 30, 40, 50, Use the least common multiple (LCM) as the denominator.

Copyright © 2013 by Monica Yuskaitis 30 Comparing Fractions Convert one or both denominators to the LCD of x < 3 10 x 2