1. CALCULATE ELAPSED TIME
Mr. Alarm Clock
CALCULATE ELAPSED TIME

2. How is elapsed time calculated?
Click on the blue arrow to go to the explanation on the next slide.

3. LET’S LOOK AT HOW TO SOLVE THIS…
Hours Minutes
+ 55
105 50
-60 45 45 60 +1
From 8:10 to 9:00 is 50 minutes. Record on the chart.
From 9:00 to 9:55 is 55 minutes. Record on the chart. Add the minutes together.
Every time you have a group of 60 minutes, you can regroup into one hour.

4. Now it is YOUR turn! Remember to use your t-chart
You can use the judy clock at the center
You can use the clock worksheets to help you
You can discuss with your partner
Explain your strategy to your partner
Have your partner explain it to you
Both of you solve the problem… then
Compare your answers
Record your answers in your measurement workbook
Answer the time questions when you have finished the problems in this presentation
Use the blue buttons to navigate
go back next slide

5. Click on the correct answer#1
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6. CLICK ON THE BLUE BUTTON TO GO TRY AGAIN
SORRY… TRY AGAIN
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7. CORRECT – RECORD YOU ANSWER
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8. Click on the correct answer#2
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9. CLICK ON THE BLUE BUTTON TO GO TRY AGAIN
SORRY… TRY AGAIN
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10. CORRECT – RECORD YOU ANSWER
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11. Click on the correct answer#3
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12. CLICK ON THE BLUE BUTTON TO GO TRY AGAIN
SORRY… TRY AGAIN
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13. CORRECT – RECORD YOU ANSWER
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14. Click on the correct answer#4
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15. CLICK ON THE BLUE BUTTON TO GO TRY AGAIN
SORRY… TRY AGAIN
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16. CORRECT – RECORD YOU ANSWER
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17. Click on the correct answer#5
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18. CLICK ON THE BLUE BUTTON TO GO TRY AGAIN
SORRY… TRY AGAIN
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19. CORRECT – RECORD YOU ANSWER
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20. Click on the correct answer#6
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21. CLICK ON THE BLUE BUTTON TO GO TRY AGAIN
SORRY… TRY AGAIN
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22. CORRECT – RECORD YOU ANSWER
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23. Click on the correct answer#7
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24. CLICK ON THE BLUE BUTTON TO GO TRY AGAIN
SORRY… TRY AGAIN
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25. CORRECT – RECORD YOU ANSWER
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26. Click on the correct answer#8
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27. CLICK ON THE BLUE BUTTON TO GO TRY AGAIN
SORRY… TRY AGAIN
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28. CORRECT – RECORD YOU ANSWER
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29. Click on the correct answer#9
Click on the correct answer

30. CLICK ON THE BLUE BUTTON TO GO TRY AGAIN
SORRY… TRY AGAIN
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31. CORRECT – RECORD YOU ANSWER
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32. Click on the correct answer
#10
Click on the correct answer

33. CLICK ON THE BLUE BUTTON TO GO TRY AGAIN
SORRY… TRY AGAIN
CLICK ON THE BLUE BUTTON TO GO TRY AGAIN

34. CORRECT – RECORD YOU ANSWER
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35. Remember to record your answers in your workbook!
GREAT JOB!
Remember to record your answers in your workbook!

36. CREDITS Animations/Clip Art
Clocks/Elapsed Time graphics from Saxon Math