4.9

Elapsed time is the amount of time that has passed between two given times.

Elapsed time should be modeled and demonstrated using analog clocks and timelines.

Elapsed time can be found by counting on from the beginning time or counting back from the ending time.

The student will use problem solving, mathematical communication, mathematical reasoning, connections, and representations to

The student will a) tell time to the nearest minute, using analog and digital clocks; b) solve practical problems related to elapsed time in one-hour increments within a 12-hour period; and c) identify equivalent periods of time and solve practical problems related to equivalent periods of time.

solve practical problems related to elapsed time in one-hour increments within a 12- hour period; and

identify equivalent periods of time and solve practical problems related to equivalent periods of time.

Using a calendar develops the concept of day as a 24-hour period rather than a period of time from sunrise to sunset.

Match a written time (e.g., 1:00, 3:30, 11:00) to the time shown on a digital and analog clock to the hour and half-hour. (a)