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Pime factor Tree
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Slide 1

Prime Factor Tree

Prime Factor Tree

Discovering Prime Factors

of Any Number

Slide 2

Definitions

Definitions

Prime Number Ė An integer whose only factors are 1 and itself.

Factor Ė a number that can divide another number without a remainder.

Prime Factors Ė an expression of numbers that divides another integer without a remainder where all the factors are prime.

Slide 3

Letís Choose a Number

Letís Choose a Number

Letís use 36

Choose any 2 factors Ė letís use 9 and 4

Now letís factor these numbers, too

Next, arrange them from least to greatest

Last, re-write as exponents

36

Slide 4

Letís Try That Again!

Letís Try That Again!

Letís use 36 again

Choose any 2 factors Ė letís use 3 and 12

Now letís factor these numbers, too

Oops, 6 is not prime - letís factor again!

Next, arrange them from least to greatest

Last, re-write as exponents

Look, itís the same answer!

36

Slide 5

Letís Re-Cap

Letís Re-Cap

Composite numbers are made up of factors

In a Prime Factor Tree, the goal is to keep reducing each factor to its lowest possible prime factors

When you have all the prime factors identified, re-arrange them from least to greatest and re-write them as exponents

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