Express time measurements in terms of a smaller unit, recording measurement equivalents in a two-column table. Solve one-step word problems that require time unit conversion.
Students have done extensive work with the relationships of time (2.MD.7a), how to read an analog clock (1.MD.3, 2.MD.7, 3.MD.1), and elapsed time (3.MD.1) in previous grades. Note, however, that 2.MD.7a is a Massachusetts-specific standard, but students are likely to know the relationships of time from real-world experience on their own.
a. How many seconds are in a minute?
b. How many minutes are in an hour?
c. How many hours are in a day?
d. How are each of these relationships represented on an analog clock? A picture of one is shown below.
Fill in the following converstion tables.
Anne, Matt, Cara, and Ross ran a half marathon but had staggered starts, so they aren’t sure who had the best time. They each recorded their run times in the following way:
|Anne||108 minutes 38 seconds|
|Matt||2 hours 4 seconds|
|Ross||2 hours 4 minutes|
United Airlines has the following contest:
You have the following flight information:
Wed, April 22
5 hr 19 min
What would you submit as your contest entry?
a. 7 days = ____________ hours
b. 12 minutes 34 seconds = ____________ seconds
Jacob needs to do his chores. It takes Jacob an hour and 45 minutes to mow the lawn and 20 minutes to clean his room. If he starts his chores at 2:00 PM, what time will he finish?