You can round numbers to tell about how much or about how many.
Rounding is one way to estimate.

To round numbers:

  • Find the place you are rounding to.

  • Look at the digit to its right.

    If the digit to the right of the place one is rounding to is
                                 less than 5, round down    ;
                               if it is 5 or greater, round up 
      .

Example 1:

Round 1,754
to the nearest
thousand

1,754  >>> 1 is in the thousands place.

Look to the right of the 1
and notice that there is a 7.

7 is "5 or higher",
so the 1 increases by 1 
and becomes a 2.

All the other numbers to the right
of the 2 now become Zeros.

Meaning:
1,754 rounds UP to 2,000

Example 2:

Round 32,795
to the nearest
ten-thousand

32,795  >>> 3 is in the ten-thousands place.

Look to the right of the 3
and notice that there is a 2.

2 is NOT "5 or higher",
so the 3 STAYS as it is.

All the other numbers to the right
of the 3 now become Zeros.

Meaning:
32,795 rounds DOWN to 30,000

 

Example 3:

Round 958
to the nearest
hundred

958  >>> 9 is in the hundreds place.

Look to the right of the 9
and notice that there is a 5.

5 is a "5 ",
so the 9 increases by 1 
and becomes a 10.

All the other numbers to the right
of the 10 now become Zeros.

Meaning:
928 rounds UP to 1,000

 

Let's Practice!
click here

When a number is halfway between two numbers, round to the greater number.

 
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Created by Ed Fayette
Updated by Nicole Freebern
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