Rounding Decimal Numbers
hundreds
|
tens
|
ones
|
|
tenths
|
hundredths
|
thousandths
|
ten-thousandths
|
hundred-thousandths
|
millionths
|
ten-millionths
|
|
3
|
4
|
.
|
0
|
5
|
9
|
2
|
|
|
|
How do we round a decimal number?
Let’s use an example to help illustrate the process…
Example: Round
34.0592 to the nearest hundredth. (The number is written in chart.)
Step 1: Identify
the place value that we are rounding to and place a square around that digit.
34.0592
Step 2: Look
at the digit to the right of the boxed number and determine if the number is a
low number or a high number.
34.0592 low
numbers high numbers
0 1 2
3 4 5 6
7 8 9
Step 3: If
the number to the right is a low number,
the boxed number stays the same. If
the number to the right is a high
number, the boxed number is rounded up one.
9 is a high number, so we change
34.0592 the 5 into a 6
Step 4: Drop
all the digits to the right of the boxed number.
34.06
Tonight's homework is to complete both sides of the rounding worksheet. You should have come close to finishing during class!
Want to practice? Try playing this game!
Have a great weekend! Enjoy the snow if it comes!
-Miss K :)
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