When there is a number subtract a negative number then you add the two numbers. For example in this case, the question is 3-(-3). The negative sign for the -3 will cancel out with the minus sign giving you 3+3. Then, the answer is 6. Another example would be 5-(-6). The minus sign cancels out the negative sign from -6 giving you 5+6. The answer is 11 in this case.
