Mental Math Tricks by Kevin OConnor - HTML preview

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Converting Kilometres to Miles

This is a useful method for when travelling between imperial and metric countries and need to know what kilometres to miles are.

The formula to convert kilometres to miles is number of (kilometres / 8 ) X 5

So lets try 80 kilometres into miles

80/8 = 10

multiplied by 5 is 50 miles!

Another example

40 kilometres

40 / 8 = 5

5 X 5= 25 miles http://www.memorymentor.com/