Show a way to count from 668 to 900 using ones, tens, and hundreds

We can count from 668 to 900 using ones, tens, and hundreds.

if we add 2 ones to 668 = 668 + 2 = the number will be 670

and then add 3 tens = 670 + 30 = 700, the number will be 700

now add 2 hundreds, 700 + 200 = 900

So the way is:

668 + 2 ones = 670

670 + 3 tens = 700

700 + 2 hundreds = 900

or

668 + 2 hundreds = 868

868 + 3 tens = 898

898 + 2 ones = 900