3 years ago

( this is sum by gcf ) 15+81= (+__)? what is the gcf of 15 and 81

2 answers:

8 0

$15+81=3(5+27) \to 3*32 =\boxed{96} \\\\ 15|3 \\ 5 \ |5 \\ 1 \\\\15=3*5 \\\\\\ 81|3 \\ 27|3 \\ 9 \ |3 \\ 3 \ |3 \\ 1 \\\\ 81=3^4 \\\\ G.C.F(15;81)=3$

mixer [17]3 years ago

4 0

$15+81=3\cdot5+3\cdot27=3(5+27)$

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3 years ago

( this is sum by gcf ) 15+81= __ (__+__)? what is the gcf of 15 and 81