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Where Are We Now?. We have learned how to: compare and order decimals. estimate by rounding and using compatible numbers. solve equations containing decimals. write numbers in scientific notation. Where Are We Going?. We will: use divisibility rules.

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Presentation Transcript
where are we now
Where Are We Now?
  • We have learned how to:
  • compare and order decimals.
  • estimate by rounding and using compatible numbers.
  • solve equations containing decimals.
  • write numbers in scientific notation.
where are we going
Where Are We Going?
  • We will:
  • use divisibility rules.
  • write numbers as products of primes.
  • find the GCF and LCM of pairs of numbers.
  • compare and order fractions.
  • simplify fractions.
  • convert fractions to decimals.
  • convert decimals to fractions.
maryland content standard
Maryland Content Standard

6.5.3:use number theory concepts of primes, factors, multiples, and rules of divisibility to show number relationships

least common multiple

Least Common Multiple

A multiple of a number is the product of the number and a whole number.

slide5

The first five non-zero multiples of 5 are: 5, 10, 15, 20, 25.

We have seen that numbers can have common factors. They also have common multiples.

slide6

List the multiples of 4:

List the multiples of 6:

Common multiples of 4 and 6 include 12 and 24. The LCM is ____________.

slide7

Study Tip!!!!!

Don’t list too many multiples of one number before beginning the other list. You may write many more than you need

slide8

Find the LCM of 8 and 10.

8: 8, 16, 24, 32, 40, 48, 56

10: 10, 20, 30, 40, 50

LCM = __________________

slide9

In one part of a musical composition, the triangle player in an orchestra plays once every 12 beats. The tympani player plays once every 9 beats. How often do they play together?

(Hint: You need to find the LCM of 12 and 9.)

slide10

A Problem for You

A local restaurant is offering a free meal to every 25th customer on Valentine’s Day and a bouquet of roses to every 12th customer. Which customer will be the first to get both a free meal and a free bouquet?

slide11

Happy Valentine’s Day

To ALL of my Sweethearts!