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Sunday, 10 January 2010

what is rounding?

Rounding is a way of simplifying numbers. If the driveway of a house is 5 metres and 7 cm long we would usually just say it is 5 m long.
Saying it's 5 m long will be close enough most of the time.

Here is another example. The picture shows a stick of rock next to a ruler. The ruler has only got the 10 cm points marked on it.

Fractions that equal one






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So if the number on the top of a fraction is the same as the number on the bottom then you have exactly one.

2/2 = 3/3 = 4/4 = 5/5 = 6/6 = 1