# Units of time #### All in One Place

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##### Intros
###### Lessons
1. Introduction to Units of Time:
2. What are the different units of time?
3. When to multiply or divide when converting units of time.
4. How to convert between different units of time.
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##### Examples
###### Lessons
1. Common Durations of Time
Which unit of time should you use to describe the following?
• Listening to a song?
• Watching a movie?
• Typing a question into a website browser?
1. Converting Units of Time in a Table
Fill in the table to convert between different units of time.
1. Minutes and seconds 2. Hours and minutes 3. Days and hours 4. Weeks and days 2. Converting Between Different Units of Time
Fill in the blanks by converting the times
1. Between seconds, minutes and hours
5 min = ____s $\qquad$ ____min = 2 h $\qquad$ 1 h = ____s $\qquad$ ____h = 240 min
2. Between hours, days and weeks
4 d = ____h $\qquad$ ____wk = 35 d $\qquad$ 1 wk = ____h $\qquad$ ____h = 3 d
3. Between months, years, decades, centuries and millennia
2 y = ____mo $\qquad$ __decades = 20 y $\qquad$ 5 centuries =__y $\qquad$ __millennia = 8000 y
3. Comparing Different Units of Time
Which amount of time is longer? Show your work; convert times into the same units to compare.
1. 90 min OR 1 h 40 min
2. 267 s OR 5 min 4
3. 126 h OR 4 d 21 h
4. 28 d OR 3 wk 5 d
5. 30 mo OR 2 y 5 mo
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##### Practice
###### Topic Notes

In this lesson, we will learn:

• The different units of time: years, months, weeks, days, hours, minutes, and seconds
• The units of time for many years: decades, centuries, millennia
• How to convert between the different units of time

Notes:

• Units of time are intervals of time that measure duration
• The most common units of time that we see are: years, months, weeks, days, hours, minutes, and seconds • Even longer intervals of time include: decades, centuries, and millennia • When converting between different units of time:
• Multiply when changing from bigger to smaller time units
• Divide when changing from smaller to bigger time units
• Use the conversion list of equivalent times: • Examples: 