why would it be seconds = 1/60 of a minute. It would be easier to say minute = 60 seconds?

It might have wanted to express minute = 60 seconds with fractions.

How many seconds are in an hour?

There are 3600 seconds in an hour. There are 60 seconds in a minute, 60 seconds in an hour, 3600 seconds in a hour, 24 hours in a day, 7 days in a week, 52 weeks in a year, 365 days in a year, 10 years in a decade, 100 years in a century, 10 decades in a century, 100000 years in an eon.

for the first section and the third question it says what the average time to pick up the phone is seconds but what if you can't find your phone.Then it can take more than a few seconds. It could take roughly 15 seconds

I lost my phone so it toke longer to find. (more like 1 hour)

What I don't understand is that on practice set 2 it asks how many hours are in 6 minutes. I put 0 and got the rest right but 0 wrong because the answer was 1/10. Why can't it just be 0.

Well 1/10 tenths of an hour is six minutes but i understand your reasoning

how many seconds are in an entire year?

In a "regular" year, there are 365 days. There are 60 * 60 = 3600 seconds in an hour. There are 3600 * 4 = 86400 seconds in a day. Thus, there are 86400 * 365 = 31,536,000 seconds in a regular year. Now, for a "leap" year, there are 366 days. So, there are 86400 * 366 * 31,622,400 seconds in a leap year.

how can we know how many hours is 6 min?

6 minutes is not enough time for their to be an hour because an hour requires 60 minutes. Therefore if you were do divide 6(minutes) by 60 you would get 0.1, That being the amount of hours in 6 minutes.

think about how old you are now try and think how much Hours you lived :)

There are a lot of ways to think about time! All these expressions mean the same thing: 1 year 12 months 52 weeks 365 days 8760 hours 525,600 minutes 31,536,00 seconds. Not only can you calculate how many *hours* you've lived, you can also calculate how many years, months, weeks, days, minutes, or even seconds you've lived! Pretty cool! :)

Main content

4th grade

Course: 4th grade > Unit 14

Lesson 8: Converting units of time

Converting units of time review (seconds, minutes, & hours)

CCSS.Math:

4.MD.A.1

5.MD.A.1

Google Classroom

Review the size of seconds, minutes, and hours and how to convert between them. Then, try some practice problems.

Units of time

Units of time measure how long something lasts. For example, how many seconds can you hold your breath, or how many minutes long is your favorite movie?

How long are different units?

A second is a short amount of time. It takes about 1 second to turn on a light or open the refrigerator door.

A minute is equal to 60 seconds. It takes about 1 minute to brush your teeth.

An hour is equal to 60 minutes. Extracurricular activities (gymnastics, piano lessons, soccer practice) often last about 1 hour.

Want to learn more about units of time? Check out this video.

Practice set 1: Estimating time

Problem 1A

Current

Identify the most reasonable unit to measure the time it takes to bake a pan of cookies.

Want to try more problems like this? Check out this exercise.

Converting larger units to smaller units

1, start text, space, m, i, n, u, t, e, end text, equals, start color #1fab54, 60, end color #1fab54, start text, space, s, e, c, o, n, d, s, end text
1, start text, space, h, o, u, r, end text, equals, start color #1fab54, 60, end color #1fab54, start text, space, m, i, n, u, t, e, s, end text

To convert larger units to smaller units we multiply the number of larger units by start color #1fab54, 60, end color #1fab54.

Example: Converting hours to minutes

1, start text, space, h, o, u, r, end text, equals, start color #1fab54, 60, end color #1fab54, start text, space, m, i, n, u, t, e, s, end text
start color #11accd, 6, end color #11accd, start text, space, h, o, u, r, s, end text, equals, start color #11accd, 6, end color #11accd, times, start color #1fab54, 60, end color #1fab54, equals, 360, start text, space, m, i, n, u, t, e, s, end text

Converting smaller units to larger units

To convert smaller units to larger units we divide the number of smaller units by start color #1fab54, 60, end color #1fab54.

1, start text, space, s, e, c, o, n, d, end text, equals, start fraction, 1, divided by, start color #28ae7b, 60, end color #28ae7b, end fraction, start text, space, m, i, n, u, t, e, end text

1, start text, space, m, i, n, u, t, e, end text, equals, start fraction, 1, divided by, start color #28ae7b, 60, end color #28ae7b, end fraction, start text, space, h, o, u, r, end text

Example: Converting seconds to minutes

1, start text, space, s, e, c, o, n, d, end text, equals, start fraction, 1, divided by, start color #28ae7b, 60, end color #28ae7b, end fraction, start text, space, m, i, n, u, t, e, end text

start color #ff00af, 30, end color #ff00af, start text, space, s, e, c, o, n, d, s, end text, equals, start fraction, start color #ff00af, 30, end color #ff00af, divided by, start color #28ae7b, 60, end color #28ae7b, end fraction, equals, start color #6495ed, start fraction, 1, divided by, 2, end fraction, end color #6495ed, start text, space, m, i, n, u, t, e, end text

Want to learn more about units of time? Check out this video.

Practice set 2: Converting units of time

Problem 2A

Current

Convert.

11 minutes equals

seconds

Want to try more problems like this? Check out these exercises:
Convert larger units to smaller units
Converting between units

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Jamie
Posted 6 years ago. Direct link to Jamie's post “How many seconds are in a...”
How many seconds are in an hour?
Button navigates to signup pageComment on Jamie's post “How many seconds are in a...”
(20 votes)
Answer
- Cheyenne Kisic
  Posted 5 years ago. Direct link to Cheyenne Kisic's post “There are 3600 seconds in...”
  There are 3600 seconds in an hour. There are 60 seconds in a minute, 60 seconds in an hour, 3600 seconds in a hour, 24 hours in a day, 7 days in a week, 52 weeks in a year, 365 days in a year, 10 years in a decade, 100 years in a century, 10 decades in a century, 100000 years in an eon.
  Comment on Cheyenne Kisic's post “There are 3600 seconds in...”
  (41 votes)
Collin
Posted 6 years ago. Direct link to Collin's post “why would it be seconds =...”
why would it be seconds = 1/60 of a minute. It would be easier to say minute = 60 seconds?
Button navigates to signup pageComment on Collin's post “why would it be seconds =...”
(24 votes)
Answer
- Maya
  Posted 3 months ago. Direct link to Maya's post “It might have wanted to e...”
  It might have wanted to express minute = 60 seconds with fractions.
  Comment on Maya's post “It might have wanted to e...”
  (2 votes)
kavand
Posted 5 years ago. Direct link to kavand's post “if you live to be 123 yea...”
if you live to be 123 years old how many weeks , days hours, minutes and seconds did you live?
Button navigates to signup pageComment on kavand's post “if you live to be 123 yea...”
(17 votes)
Answer
Eric Roza
Posted 6 years ago. Direct link to Eric Roza's post “for the first section and...”
for the first section and the third question it says what the average time to pick up the phone is seconds but what if you can't find your phone.Then it can take more than a few seconds. It could take roughly 15 seconds
Button navigates to signup pageComment on Eric Roza's post “for the first section and...”
(12 votes)
Answer
- Zachary
  Posted 2 years ago. Direct link to Zachary's post “I lost my phone so it tok...”
  I lost my phone so it toke longer to find. (more like 1 hour)
  Comment on Zachary's post “I lost my phone so it tok...”
  (8 votes)
Keelie
Posted 5 years ago. Direct link to Keelie's post “What I don't understand i...”
What I don't understand is that on practice set 2 it asks how many hours are in 6 minutes. I put 0 and got the rest right but 0 wrong because the answer was 1/10. Why can't it just be 0.
Button navigates to signup pageComment on Keelie's post “What I don't understand i...”
(11 votes)
Answer
- romirgade
  Posted 5 years ago. Direct link to romirgade's post “Well 1/10 tenths of an ho...”
  Well 1/10 tenths of an hour is six minutes but i understand your reasoning
  Comment on romirgade's post “Well 1/10 tenths of an ho...”
  (4 votes)
Megan the Magical Mango
Posted 5 years ago. Direct link to Megan the Magical Mango's post “how many seconds are in a...”
how many seconds are in an entire year?
Button navigates to signup pageComment on Megan the Magical Mango's post “how many seconds are in a...”
(8 votes)
Answer
- Marvin Cohen
  Posted 2 years ago. Direct link to Marvin Cohen's post “In a "regular" year, ther...”
  In a "regular" year, there are 365 days. There are 60 * 60 = 3600 seconds in an hour. There are 3600 * 4 = 86400 seconds in a day. Thus, there are 86400 * 365 = 31,536,000 seconds in a regular year.
  
  Now, for a "leap" year, there are 366 days. So, there are 86400 * 366 * 31,622,400 seconds in a leap year.
  Comment on Marvin Cohen's post “In a "regular" year, ther...”
  (5 votes)
Shayna Vinoth
Posted 6 years ago. Direct link to Shayna Vinoth's post “how can we know how many ...”
how can we know how many hours is 6 min?
Button navigates to signup pageComment on Shayna Vinoth's post “how can we know how many ...”
(7 votes)
Answer
- Cheyenne Kisic
  Posted 5 years ago. Direct link to Cheyenne Kisic's post “6 minutes is not enough t...”
  6 minutes is not enough time for their to be an hour because an hour requires 60 minutes. Therefore if you were do divide 6(minutes) by 60 you would get 0.1, That being the amount of hours in 6 minutes.
  Comment on Cheyenne Kisic's post “6 minutes is not enough t...”
  (2 votes)
Jakob
Posted 3 years ago. Direct link to Jakob's post “think about how old you a...”
think about how old you are now try and think how much Hours you lived :)
Button navigates to signup pageComment on Jakob's post “think about how old you a...”
(5 votes)
Answer
- Bug Sanders
  Posted 3 years ago. Direct link to Bug Sanders's post “There are a lot of ways t...”
  There are a lot of ways to think about time!
  All these expressions mean the same thing:
  1 year
  12 months
  52 weeks
  365 days
  8760 hours
  525,600 minutes
  31,536,00 seconds.
  
  Not only can you calculate how many hours you've lived, you can also calculate how many years, months, weeks, days, minutes, or even seconds you've lived! Pretty cool! :)
  Comment on Bug Sanders's post “There are a lot of ways t...”
  (11 votes)
♥ Valeria's Homework ♥
Posted 3 years ago. Direct link to ♥ Valeria's Homework ♥'s post “how many seconds are in 1...”
how many seconds are in 11 minutes?
Button navigates to signup pageComment on ♥ Valeria's Homework ♥'s post “how many seconds are in 1...”
(6 votes)
Answer
- anavin.srison
  Posted 2 months ago. Direct link to anavin.srison's post “660 seconds.”
  660 seconds.
  Button navigates to signup page
  (3 votes)
samyrafleuristil is silly
Posted 4 months ago. Direct link to samyrafleuristil is silly's post “why didn't you add a whit...”
why didn't you add a whiteboard. Life would be so much easier.
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(4 votes)
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