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# Where Are We Now - PowerPoint PPT Presentation

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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## PowerPoint Slideshow about 'Where Are We Now' - elina

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Presentation Transcript

• 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.

• 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.

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

### Least Common Multiple

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

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.

List the multiples of 6:

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

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

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

10: 10, 20, 30, 40, 50

LCM = __________________

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.)

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?

To ALL of my Sweethearts!