72 can be split into 8 and 9 8 can be split into 4 and 2 . . . 9 can be split into 3 and 3 4 can be split into 2 and 2 72=8x9=2x4x3x3=2x2x2x3x3
72
36,2
16,2,2
9,2,2,2
3,3,2,2,2
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72 8,9 2,4,3,3 2,2,2,3,3
72 ^ 9x8 ^ ^ 3x3 4x2 ^ 2x2
72 36,2 18,2,2 9,2,2,2 3,3,2,2,2
72 ^ 3 24 ^ 3 8 ^ 2 4 ^ 2 2 Result is: 2x2x3x3=72 Make sure to use exponents If this is for school!
The GCF of 72 and 144 is 72. Since 72 is a factor of 144, it is automatically the GCF.