We are in the middle of a quick unit on time, and the toughest concept so far has been elapsed time. We are trying to figure out how much time has passed, or when a certain event will end if it starts at a certain time and lasts a certain number of minutes. It's hard, because kids want to use subtraction, but that doesn't always work! (Think, if you try to do 3:10 minus 40 minutes, using the standard subtraction algorithm, it just won't work!) Here is a video for how we discuss it in class. Hope it helps with the homework!!
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Tuesday, February 11, 2014
Elapsed Time
Hello!
We are in the middle of a quick unit on time, and the toughest concept so far has been elapsed time. We are trying to figure out how much time has passed, or when a certain event will end if it starts at a certain time and lasts a certain number of minutes. It's hard, because kids want to use subtraction, but that doesn't always work! (Think, if you try to do 3:10 minus 40 minutes, using the standard subtraction algorithm, it just won't work!) Here is a video for how we discuss it in class. Hope it helps with the homework!!
(PS. my class phone rings 3 times in this video...aaannnoying!!! Sorry about that! )
We are in the middle of a quick unit on time, and the toughest concept so far has been elapsed time. We are trying to figure out how much time has passed, or when a certain event will end if it starts at a certain time and lasts a certain number of minutes. It's hard, because kids want to use subtraction, but that doesn't always work! (Think, if you try to do 3:10 minus 40 minutes, using the standard subtraction algorithm, it just won't work!) Here is a video for how we discuss it in class. Hope it helps with the homework!!
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