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Here we have a look at Clocks, Time and Adding and Subtracting Time.
In our world we have digital clocks and clocks with hands.
Time - AM/PM vs 24 Hour Clock
Normally the time is shown as Hours: Minutes. There are 24 Hours in a Day and 60 Minutes in each Hour.
Adding and Subtracting Time
Add or Subtract the hours and minutes separately. But you may need to do some adjusting if the minutes end up 60 or more, or less than zero.
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