Rounding to Tens and Hundreds

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What is rounding in mathematics?

Back

Rounding is the process of adjusting the digits of a number to make it simpler while keeping its value close to what it was. It often involves increasing or decreasing the number to the nearest specified place value.

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How do you round a number to the nearest ten?

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To round a number to the nearest ten, look at the digit in the ones place. If it is 5 or greater, round up by adding 1 to the ten's place. If it is less than 5, round down by keeping the ten's place the same.

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What is the nearest ten for the number 599?

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The nearest ten for the number 599 is 600.

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How do you round a number to the nearest hundred?

Back

To round a number to the nearest hundred, look at the digit in the ten's place. If it is 5 or greater, round up by adding 1 to the hundred's place. If it is less than 5, round down by keeping the hundred's place the same.

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What is the nearest hundred for the number 777?

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The nearest hundred for the number 777 is 800.

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Front

What does it mean to round addends in an expression?

Back

Rounding addends in an expression means adjusting the numbers to the nearest specified place value (like tens or hundreds) before performing the addition, to simplify the calculation.

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What is the sum of the addends 238 and 519 rounded to the nearest hundred?

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The sum of the addends 238 and 519 rounded to the nearest hundred is 200 + 500.

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If a number rounds to 80 when rounded to the nearest ten, what is the smallest number it could be?

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The smallest number that could round to 80 when rounded to the nearest ten is 75.

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Front

How do you estimate the total of two numbers when rounding?

Back

To estimate the total of two numbers when rounding, round each number to the nearest specified place value and then add the rounded numbers together.

Front

What is the approximate total number of books if Mrs. Walters has 522 realistic fiction books and 239 fantasy books, rounded to the nearest hundred?

Back

The approximate total number of books is about 700 when rounded to the nearest hundred.