Rounding Up/ Down the Easy Way
You'll most likely see problems about rounding on your exam. Say, for example, you're asked to round 1,576 to the hundreds place. Think of any number as a representation of 'places.' Meaning, going from left to right, you have the ones place, then the tens place, then the hundreds place and then the thousands place. If you're given hundreds of dollars, you know there will be 3 digits.
Imagine that someone is giving you that $1,576 amount above, but the person only had hundred dollar bills. To round the number to the hundreds place (..the whole number, not a number with a decimals, or cents, portion, like $1,576.25), go the end of the number and assume the decimal place is there with two zeros...1,576.00, and move the decimal place 2 spaces to the left. So you have 15'.'76...Now look at the number to the left of your decimal place...It's 5. If the number is 5 or greater, make it one higher...so, we'll replace it with a 6, and put 2 zeros after the 6 to represent the tens and ones place.
We now have $1,600 as the amount the person would pay you. It's the original amount rounded to the hundreds place.
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