January 30th, 2008
Qualifying Heartbeat!
If Lewis Hamilton started counting his heartbeat at midnight on the 6th July 2007, when would he have counted his millionth beat?
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Wednesday, January 30th, 2008 at 11:08 am under
Maths Day One, Year 5/6 .
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We thought that lewis hamilton would have about 2 heart beats per second so we worked out his millionth beat would be about 138 hours 53 miniutes but at the beginning we thought he would have 4 beats a second which was to much!
January 30th, 2008 at 11:16 am70X60=4200X24=100800
January 30th, 2008 at 11:16 am1000000 divide by 100800=9.9206349
Saying that he has 85 heart beats a minute we times it by 60 to get the hour which was 5,100bpm then 24 to get the day which was 122,400bpm and then do a million divided by this number.Our answer is the 14th of July as it is 8 days. If the average was 90 the answer would be the 13th of July.
January 30th, 2008 at 11:17 amwe found out how many heartbeats in our in one hour by x 60 by 60 witch was 3600 we took away the two place holders and divided it by 12.
January 30th, 2008 at 11:18 amone million / 2 / 60 / 60 / 24 = 5.7870366*
11th July 5am 2007
January 30th, 2008 at 11:19 amFirst we decided on the amount of heartbeats per minute (90) then multiplied it by 60 to get an hour (5,400). We then kept doubling until we got 998,600 (259 hours) so we were left with 2,400 , which was less than an hour, so we estimated to add on 20 minutes and Lewis Hamilton would stop counting on the 17th of July 2007.
January 30th, 2008 at 11:21 amto work it out we estimated that it was 100 beats in a minute. We then times 60 by 100 which gve us 6000 beats in a hour. We then did 6000 times 24 to get 144000 beats in a day.this gave us the final answer of taking6 and 3/4 days which made the date 12th July 2007 around 6pm.
January 30th, 2008 at 11:24 amInteresting to see the different initial estimates of heart rate and the subsequent explanations. You all worked well on this task.
What do you think makes a clear explanation of mathematical workings and processes?
Which do you think is the clearest example above?
January 30th, 2008 at 7:35 pm