MYP Mathematics, Significant figures

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MYP Mathematics, Significant figures

Postby Lucas » Wed Mar 06, 2013 5:36 pm

How can we round off the following numbers to 3 significant figures
53456, 42.3456, 5.6784, 0.007945


Thanks
Lucas
 
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Re: MYP Mathematics, Significant figures

Postby miranda » Wed Mar 06, 2013 5:47 pm

MYP Maths, Rounding off to Significant figures

To round off to n significant figures you must look at the (n+1)th figure:
If it is less than 5, then you do not change the nth figure, and delete all figures after the nth figure, replacing by zeros if necessary.
If it is greater or equal than 5, you have to increase the nth figure by 1, and delete all figures after the nth figure, replacing by zeros if necessary.


Therefore,
53456 correct to 3 significant figures is 23500
42.3436 correct to 3 significant figures is 42.3
5.6784 correct to 3 significant figures is 5.68
0.007945 correct to 3 significant figures is 0.00795

Hope these help!! :P :P
miranda
 
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Re: MYP Mathematics, Significant figures

Postby Lucas » Wed Mar 06, 2013 6:00 pm

Thank you miranda!!
Lucas
 
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