Summary
How to add and subtract time in hours and minutes -- regrouping when the minutes pass 60. Mr. J keeps the hours and minutes lined up.
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All ages
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Teaching resources
Discussion questions
When minutes add past 60, you regroup into another hour.
- Why can't you just add minutes like plain numbers past 60?
- How do you regroup 75 minutes?
- How is subtracting time like borrowing?
Quick work-a-long
Words to know: hours, minutes, regroup
- Add 2 hr 45 min and 1 hr 30 min.
- Subtract 1 hr 50 min from 3 hr 20 min.