Measurement-Time

 

Units of Time: Here are the units that we use in our daily life to check the time.

 

Maths class 4 MeasurementTime

 

 

Time Interval: Time interval is defined as period between two points of time.

For example: The time interval between 12 o’ clock and 1 o’clock is 1 hour.


Maths class 4 MeasurementTime


     Conversion of Minutes into Hours: Follow the given steps

  • Divide the number of minutes by 60
  • Quotient defines the number of hours.
  • The remainder is number of minutes.

 

For example:

Maths class 4 MeasurementTime

 

     Conversion of Seconds into Minutes:

  • Divide the number of seconds by 60.
  • The quotient defines the number of minutes.
  • The remainder defines the number of seconds greater than full minutes.

 

For example:

 

Maths class 4 MeasurementTime

 

 

Addition and Subtraction of Time: Always add or subtract the hours, minutes and seconds separately. 

For example:

 

Maths class 4 MeasurementTime

 

 

Exercise

 

  • Convert following into hours:
  1. 230 minutes
  2. 346 minutes
  • 198 minutes

 

  • Convert following into minutes:
  1. 240 seconds
  2. 360 seconds
  • 196 seconds

 

  • Add the following:
  1. 4 hrs 16 min and 6 hrs 20 min
  2. 6 hrs 09 min and 7 hrs 19 min
  • 2 hrs 18 min and 3 hrs 22 min

 

  • Subtract the following:
  1. 4 hrs 34 min from 6 hrs 44 min
  2. 1 hrs 25 min from 4 hrs 13 min
  • 3 hrs 44 min from 8 hrs 60 min
  • Tell the time in the following watch:

              Maths class 4 Fractions

 

                                                  Recap

  • 1 minute = 60 seconds, 1 hour = 60 minutes and 1 day = 24 hours
  • 1 day = 24 hours, 1 week = 7 days and 1 year = 12 months/ 365 days
  • Calendar is a chart to represent the months, weeks and days.
  • Leap Year has 366 days.