Derive Unit Rates with Clock & Calendar Time 5-120
Derive unit rates for clock and calendar time. If 480 hours = 20 days, how many hours is 1 day? Draw a bar model to see 24 hr = 1 d. Thinking proportionally, 480 hr = 20 d, so 240 hr = 10 d, and 24 hr = 1 d. Learn and memorize – commit to memory – common conversion rates for units of time.
