Explain how modulus is used in your calculations. Describe one other technique for performing the calculations and compare it to the use of modulus. Does modulus simplify the calculations?

Adding times is similar to adding two 3 digit numbers. You add them digit by digit and, when the sum exceeds 9, you do a carry. Explain how adding number is similar to adding times and where the two techniques differ and why.

Assume that, instead of adding hours, minutes and seconds, you need to add years, months and days. What new problems would you encounter solving this problem that you did not have to worry about in the addition of times? Describe how you would solve these problems.