how do you subtract in base five?
Rather than begin with subtraction, I'm going to show you how to add numbers in base 5 because I think it will be easier to follow.
To subtract, just replace the + sign with a – sign.
We generally use the number base 10.
This is convenient. Humans have exactly 10 fingers to count with.
That is where the expanded form of a number becomes useful.
How to write the expanded form of a number is routinely taught in grade school and middle school.
Write the number 375 in expanded form.
What is 375 + 110 ?
If we switch our number base to 5 instead of 10, we can apply the same idea. The only difference will be, EVERY DIGIT WILL BE A POWER OF 5.