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GROWING A FACTOR TREE Or Or Can think You might Youyou might You might of one notice that notice that 180 180 see 180 FACTOR Can we has a ZERO in has athat ZERO in PAIR for 180 isits anONES EVEN its ONES grow a ? PLACE which NUMBER PLACE which tree of means itit is means is a a and that the This should be multiple of 10. multiple of 10. means that two numbers factors SO… is a SO… that2 multiply of 180? 10 x • 10 x •= = 180 180 factor… together to give the 2 x •= 180 ? Product 10 x 18 =180. 180 180 10 18 180 NOW You have to find FACTOR PAIRS for 10 and 18 10 18 We “grow” this “tree” downwards since that is how we write in English (and we are not sure how big it will be. We could run out of paper if we grew upwards). 180 Find factors for 10 & 18 18 10 2 x 5 = 10 2 5 6 3 6x3= 18 Since 2ARE and 3 and 5 are PRIME WE NUMBERS they do not DONE grow “new branches”. ??? They just grow down alone. 180 Since 6 is NOT a prime number - it is a COMPOSITE NUMBER - it still has factors. Since it is an EVEN NUMBER we see that: 18 10 6=2x• 2 2 5 6 3 5 2 3 3 FCAT 2.0 Sample Test Question Answer: C FCAT 2.0 Test Spec. Item MA.5.A.6.1 Identify and relate prime and composite numbers, factors and multiples within the context of fractions.