## MYP Mathematics, Significant figures

number, algebra, geometry and trigonometry, statistics and probability, discrete mathematics.

### MYP Mathematics, Significant figures

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

Thanks
Lucas

Posts: 0
Joined: Mon Jan 28, 2013 8:05 pm

### Re: MYP Mathematics, Significant figures

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!!
miranda

Posts: 268
Joined: Mon Jan 28, 2013 8:03 pm

### Re: MYP Mathematics, Significant figures

Thank you miranda!!
Lucas

Posts: 0
Joined: Mon Jan 28, 2013 8:05 pm