2,168 - (2 x _____) + (1 x ______) + (6 x ___________) + (8 x __________)

I need to fill in the blanks for the extended notation
2,168 - (2 x _____) + (1 x ______) + (6 x ___________) + (8 x __________)

Since we count in base 10, think in terms of powers of 10. As an example, the number 576 is made up of 5 one hundreds, 7 tens, and 6 ones, like this:

500+
70+
6
-----
576

Or: 5*100 + 7*10 + 6*1

Get it? Now apply this same technique to your problem.