Prime Factor Tree Discovering Prime Factors  of Any Number
Definitions Prime Number – An integer whose only factors are 1 and itself. Factor – a number that can divide another number without a remainder. Prime Factors – an expression of numbers that divides another integer without a remainder where all the factors are prime.
Let’s Choose a Number Let’s use 36 Choose any 2 factors – let’s use 9 and 4 Now let’s factor these numbers, too Next, arrange them from least to greatest Last, re-write as exponents 36 4 9 x 2 2 x x 3 3 2 2 x 3 2 2 2 3 3 x x
Let’s Try That Again! Let’s use 36 again Choose any 2 factors – let’s use 3 and 12 Now let’s factor these numbers, too Oops, 6 is not prime - let’s factor again! Next, arrange them from least to greatest Last, re-write as exponents Look, it’s the same answer! 36 3 x x 2 6 12 3 x 3 x x 3 2 2 x 2 x 3 x x 2 3 2 2 x 3 2
Let’s 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
This powerpoint was kindly donated to  www. worldofteaching .com http://www. worldofteaching .com  is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.

Prime Factor Tree

  • 1.
    Prime Factor TreeDiscovering Prime Factors of Any Number
  • 2.
    Definitions Prime Number– An integer whose only factors are 1 and itself. Factor – a number that can divide another number without a remainder. Prime Factors – an expression of numbers that divides another integer without a remainder where all the factors are prime.
  • 3.
    Let’s Choose aNumber Let’s use 36 Choose any 2 factors – let’s use 9 and 4 Now let’s factor these numbers, too Next, arrange them from least to greatest Last, re-write as exponents 36 4 9 x 2 2 x x 3 3 2 2 x 3 2 2 2 3 3 x x
  • 4.
    Let’s Try ThatAgain! Let’s use 36 again Choose any 2 factors – let’s use 3 and 12 Now let’s factor these numbers, too Oops, 6 is not prime - let’s factor again! Next, arrange them from least to greatest Last, re-write as exponents Look, it’s the same answer! 36 3 x x 2 6 12 3 x 3 x x 3 2 2 x 2 x 3 x x 2 3 2 2 x 3 2
  • 5.
    Let’s Re-Cap Compositenumbers 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
  • 6.
    This powerpoint waskindly donated to www. worldofteaching .com http://www. worldofteaching .com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.