Respuesta :

GCF, namely their common factor.


[tex] \bf 44+40\implies \stackrel{\textit{GCF of 4}}{4(11+10)}~\hspace{7em}13+52\implies \stackrel{\textit{GCF of 13}}{13(1+4)}
\\\\\\
15+81\implies \stackrel{\textit{GCF of 3}}{3(5+27)}~\hspace{7.5em}64+28\implies \stackrel{\textit{GCF of 4}}{4(16+7)} [/tex]

mindlyovo
GCF: Greater common factor

44+40=84
GCF of 44 is divided by 1,2,4,11,22,44
GCF of 40 is divided by 1,2,4,5,8,10,20,40
Circle the same number of both side you'll get 1,2,4 the greatest number is (4 ) they want the greatest number of both side you circle.
4/44=1
4/40=20
44+40=(4×1)+(4×20)=84

Hope this helps you.

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