They are equal because if you simplify 2/6 then that will equal 1/3 so the problem is 1/3 _1/3 and that will be =
The first 5 is in the 10s place. The second is in the ones. To write this out, it would be 5 tens (50), plus 5 ones (5); 55. I don't know if this is what you were looking for, but I hope I could help in some way!
0.001*3=0.003
0.003^2=0.000009
