20 - 0

If you subtract nothing from twenty you still have twenty.

yes the answer is 20

To find the answer to the subtraction problem 20 - 0, you simply subtract 0 from 20.

When subtracting, you start with the first number (which is 20 in this case) and then subtract the second number (which is 0 in this case). Since any number subtracted from 0 is always equal to the original number, the answer is 20.

So, 20 - 0 = 20.