1: \(939472+928720+846948+387049+837861+847840\)
\(=\left(939472+846948\right)+\left(928720+847840\right)+\left(387049+837861\right)\)
=1786420+1776560+1224910
=4787890
2:
\(38457+8488375+4849573+746503\)
\(=38457+746503+8488375+4849573\)
\(=784960+13337948=14122908\)