epdf.pub_cbest-cliffs-test-prep13a9b242c7cb4125e6cca92d00a73d5a41681

Part IV: Mathematics Review
Arithmetic Review
Rounding Off
To round off any number:
1. Underline the place value to which you’re rounding off.
2. Look to the immediate right (one place) of your underlined place value.
3. Identify the number to the right. If it is 5 or higher, round your underlined
place value up 1. If the number to the right is 4 or less, leave your underlined
place value as it is and change all the other numbers to its right to zeros.
For example:
Round to the nearest thousand:
345,678 becomes 346,000
928,499 becomes 928,000
This works with decimals as well. Round to the nearest hundredth:
3.4678 becomes 3.47
298,435.083 becomes 298,435.08
Place Value
Each position in any number has place value. For instance, in the number 485, 4
is in the hundreds place, 8 is in the tens place, and 5 is in the ones place. Thus,
place value is as follows:
3 , 0
9 2 , 3 4 5 , 8 7 6 . 4 3 6 2 9 7 0 2
billions
hundred millions
ten millions
millions
hundred thousands
ten thousands
thousands
hundreds
tens
ones
tenths
hundredths
thousandths
ten-thousandths
hundred-thousandths
millionths
ten-millionths
hundred-millionths
and so on
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