Round a Number

How to round a number to the tenth, hundredth, thousandth: 4 examples and their solutions.

Example 1

Example

Solution

Find the number in the hundredth.
It's 1.

2: ones
0.7: tenth
0.01: hundredth
0.008: thousandth
0.0002: ten-thousandth
0.00008: hundred-thousandth

See the number on the right side of the 1.
It's 8.
This 8 is [greater than or equal to 5].
Then add 1 the hundredth number 1: 1 + 1 = 2.

So write 2.72.
Drop the numbers on the right side of the hundredth: 828... .

So 2.72 is the answer.

Example 2

Example

Solution

Find the number in the hundredth.
It's 4.

See the number on the right side of the 4.
It's 1.
This 1 is not [greater than or equal to 5].
Then leave the hundredth number 4.

So write 3.14.
Drop the numbers on the right side of the hundredth: 1592... .

So 3.14 is the answer.

Example 3

Example

Solution

Find the number in the tenth.
It's 1.

See the number on the right side of the 1.
It's 4.
This 4 is not [greater than or equal to 5].
Then leave the tenth number 1.

So write 3.1.
Drop the numbers on the right side of the tenth: 41592... .

So 3.1 is the answer.

Example 4

Example

Solution

Find the number in the thousandth.
It's 1.

See the number on the right side of the 1.
It's 5.
This 5 is [greater than or equal to 5].
Then add 1 the thousandth number 1: 1 + 1 = 2.

So write 3.142.
Drop the numbers on the right side of the thousandth: 592... .

So 3.142 is the answer.