Mimis math class starts at 9:00 A.M. and lasts for 1 hour and 55 minutes. After math class, Mimi has

Discussion in 'Calculator Requests' started by math_celebrity, Jan 15, 2017.

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  1. math_celebrity

    math_celebrity Administrator Staff Member

    Mimis math class starts at 9:00 A.M. and lasts for 1 hour and 55 minutes. After math class, Mimi has recess for 15 minutes. What time does Mimis recess end?

    1. Start at 9:00 AM
    2. 1 hour and 55 minutes of class puts us at 10:55 AM
    3. Recess for 15 minutes puts us at 11:10 AM

    1. Another way to do this is work in whole hours and minute blocks
    2. 9:00 AM, add 1 hour that is 10:00 AM
    3. 55 minutes is 5 minutes less than 1 hour
    4. So add another hour to 10:00 AM which is 11:00 AM
    5. Subtract the 5 minutes is 10:55 AM
    6. 15 minutes is 5 minutes + 10 minutes
    7. Add 5 minutes to 10:55AM is 11:00
    8. 10 minutes added to this is 11:10 AM
     

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