There are two ways to round a number. You can round a number to a specific place value or to a specific significant figure.

Rounding to a specific place value

The first step is to identify the place value of each digit in our number. Suppose we have this number; the place value of each digit is as follows:

To round this number to the nearest 10,000

To round this number to the nearest 100, we follow the same steps

Rounding to a specific significant figure

The steps taken to round a number to a significant figure are the same as those taken when rounding to place value; but there is an additional rule you need to keep in mind

Zeros at the beginning and at the end of the number are NOT CONSIDERED as significant figures.

with this in mind, let’s look at an example. First, we label our significant figures.

To round this number to 1 significant figure (1SF)

To round this number to 2 significant figures (2SF)

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