LI: To use the most efficient strategy to find the answers.
LI: To use LS2 Maths Talk to dicuss strategies.
This week for Maths, we have been solving equations that were related to the Olympics.
The question:
On average, every swim stroke Michael Phelps takes gets him 2 meters down the pool. Michael competed in 8 separate events during the 2008 Olympics in Beijing:
400m individual medley
4x100m freestyle relay
200m freestyle
200m butterfly
4x200m freestyle relay
200m individual medley
100m butterfly
4x100m medley relay
In total, how many meters did Michael swim for his gold medals?
Finally, how many strokes did Michael have to take in total for all of his events combined if Michael can propel himself 2 meters with each stroke?
The stradegy that I used was multiplication and division.
For the freestyle relay (4x100m), we didn't multiply it, the 4 is the amount of people that did it so Michael was 1 of 4 so it is 100 same for the medley relay and the second freestyle relay.
The maths:
400
100
200
200
200
100
100
-----------
1500
Then, I divide 1500 by 2 because for every stroke Michael takes it is 2 meters.
1500 divided by 2 = 750
So 750 is the amount of strokes to take Michael over to the end of the pool.
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