Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download GCF NOTES.notebook
Document related concepts
Transcript
GCF NOTES.notebook September 11, 2014 GREATEST COMMON FACTOR (GCF) _______________ ______________ ________________ (GCF) the greatest factor of two or more given numbersÍž this means you have to find the biggest number which goes into the given numbers evenly. * There may be a few common factors, but there can only be one GCF. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Let's find the GCF of 24 & 36 Method #1 Use the "sled" method. Step 1: Put both number in the "sled." Start by seeing what number will go into BOTH numbers. If both numbers are even, "2" is a good starting point. Continue asking yourslef what numbers will go into BOTH numbers. 24 36 Step 2: Continue dividing until you can't divide both number by a common factor. Step 3: Circle the factors which went into both numbers these are the common to both 24 & 36. Step 4: Multiply the circled numbers to get the GCF GCF = ____ x ____ x ____ = ____ This means "____" is the largest number which will go into both 24 and 36! 1 GCF NOTES.notebook September 11, 2014 Another method for finding the GCF It is easier to miss a factor this way, so I recommend using method #1! METHOD #2: Find the factors for both numbers and then locate the greatest number which is a factor of both numbers. Pick a way to find factor pairs (refer to the "Factors" notes if needed). ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Step 1: Find the factor pairs (use any of the three methods). 24 36 Step 2: Locate (circle) the greatest number which is a factor for BOTH numbers. GCF = ____ 2 GCF NOTES.notebook September 11, 2014 GCF EXAMPLES 1) Find the GCF of 16 & 80 using both methods. SLED FACTOR PAIRS 2) Find the GCF of 15 & 32. SLED FACTOR PAIRS 3) Find the GCF of 36 & 54. SLED FACTOR PAIRS 3 GCF NOTES.notebook September 11, 2014 4
