Rounding To the Nearest Tens and Hundreds

Front

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.

Front

What does it mean to round to the nearest ten?

Back

Rounding to the nearest ten means adjusting a number to the closest multiple of ten. If the last digit is 5 or more, you round up; if it's less than 5, you round down.

Front

What does it mean to round to the nearest hundred?

Back

Rounding to the nearest hundred means adjusting a number to the closest multiple of one hundred. If the last two digits are 50 or more, you round up; if they are less than 50, you round down.

Front

How do you round the number 988 to the nearest hundred?

Back

To round 988 to the nearest hundred, look at the last two digits (88). Since 88 is greater than 50, you round up to 1,000.

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How do you round the number 42 to the nearest ten?

Back

To round 42 to the nearest ten, look at the last digit (2). Since 2 is less than 5, you round down to 40.

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How do you round the number 144 to the nearest ten?

Back

To round 144 to the nearest ten, look at the last digit (4). Since 4 is less than 5, you round down to 140.

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How do you round the number 35 to the nearest hundred?

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To round 35 to the nearest hundred, look at the last two digits (35). Since 35 is less than 50, you round down to 0.

Front

How do you round the number 487 to the nearest hundred?

Back

To round 487 to the nearest hundred, look at the last two digits (87). Since 87 is greater than 50, you round up to 500.

Front

What is the rule for rounding numbers?

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The general rule for rounding is: if the digit to the right of the rounding place is 5 or greater, round up; if it is less than 5, round down.

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Why is rounding important in mathematics?

Back

Rounding is important because it simplifies numbers, making them easier to work with, especially in estimation and when dealing with large numbers.