Question

Do u guys know what this means???? + can someone help me?

Answer 1

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.

Answer 2

GCF, namely their common factor.

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