Practice Addition and Subtraction
Getting started with addition and subtraction of both positive and negative numbers and decimal numbers. Remember to keep the decimal points lined up and that subtracting a negative is the same as adding.
What is the difference between -4 and -0.4?
This is the same as asking how far apart are -4 and-0.4
This becomes -0.4 - -4 which simplifies to -0.4 + 4
So the answer is 3.6