This activity allows the user to practice determining the elapsed time given a starting time and an ending time. Elapsed time is the time or difference between a beginning time and an ending time. Finding elapsed time is an important skill in everyday life. Determining elapsed time requires understanding how to read a clock and understanding how we measure time because we don't usually use our traditional decimal (base ten) system to measure time. For instance, say you want to figure out how much time you spend in school each day. If your school day starts at 7:45 am and your last class ends at 3:05 pm, how much time is that? It's a subtraction problem but you can not use the same method for subtraction that you use if you were just subtracting whole numbers or decimals:
As is typical with most math, you can think about the problem many ways. Here are a couple of ways:
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