Ther eis probably a 1e6 at the top of the display. You can do 'format bank' to mitigate this if you want or any other format options. Example:
% random matrix with entries that vary in magnitude
A = [-823 8 1e6
-584 8 1
-409 8 1
-304.928530000000 8 1
-298.500000000000 8 1
-300.750000000000 8 1];
% display the matrix
A
% display subsection of matrix
A(1:2,1:2)
% display via format bank
format bank
A