Add and Subtracting Time

How many minutes are in 1 hour

• 30 minutes
• 60 minutes
• 100 minutes

When adding time, I must regroup my minutes for hours when the sum of the minutes is

• 100 or more
• 10 or more
• 30 or more
• 60 or more

  4 hours 15 minutes
+ 5 hours 30 minutes

• 9 hours 45 minutes
• 1 hour 15 minutes
• 9 hours 40 minutes
• 10 hours

  2 hours 35 minutes
+ 2 hours 20 minutes

• 5 hours 45 minutes
• 5 hours 55 minutes
• 4 hours 55 minutes
• 15 minutes

  6 hours 05 minutes
+ 1 hour  35 minutes

• 7 hours 30 minutes
• 5 hours 30 minutes
• 7 hours 40 minutes
• 4 hours 40 minutes

  4 hours 55 minutes
+ 6 hours 15 minutes

• 2 hours 40 minutes
• 10 hours 70 minutes
• 10 hours 40 minutes
• 11 hours 10 minutes

  2 hours 57 minutes
+ 2 hours 08 minutes

• 5 hours 5 minutes
• 49 minutes
• 4 hours 49 minutes
• 4 hours 65 minutes

  5 hours 35 minutes
+1 hour 37 minutes

• 8 hours 35 minutes
• 7 hours 10 minutes
• 7 hours 12 minutes
• 4 hours 2 minutes

When subtracting minutes, if there are more minutes on the floor I must go next door and get

• 10 more
• 60 more
• 100 more

  12 hours 35 minutes
-  7 hours 10 minutes

• 19 hours 45 minutes
• 5 hours 45 minutes
• 5 hours 25 minutes
• 12 hours 25 minutes