Thursday, May 28, 2015

May 30 on Big Numbers

Big numbers are not so common.

But in today's newspaper, I come across several. Parents can use the newspaper as a source of guiding their children in learning mathematics.

In 1974, anthropologists in Ethiopia found the astonishing fossilised remains of a human-like creature who last walked the planet some 3.2 million years ago. | Straits Times

The above can lead to an understanding of the magnitude of the million. The fact that this year is just 2015 years after the birth of Christ makes 3.2 million years ago seems like several lifetime (literally!!) away.

Did you know that Singapore does quite a bit of business in exporting ornamental fish?

Value of Ornamental Fish Exported
2008 USD69 million
2009 USD60 million
2012 USD62 million
2013 USD56 million

Parents can use this with upper primary children to calculate percentage change. Or learn the use of line graphs to make predictions.

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