Rounding - 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 or easier to work with, typically by increasing or decreasing it 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, round up; if it's 4 or less, 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, round up; if they are 49 or less, round down.

Front

Which number rounds to 20 when rounding to the nearest ten?

Back

The numbers 15, 16, 17, 18, and 19 round to 20 when rounding to the nearest ten.

Front

Which number does NOT round to 20 when rounding to the nearest ten?

Back

The number 25 does not round to 20; it rounds to 30.

Front

How do you round the number 907 to the nearest hundred?

Back

To round 907 to the nearest hundred, look at the last two digits (07). Since 07 is less than 50, round down to 900.

Front

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, round down to 40.

Front

How do you round the number 774 to the nearest ten?

Back

To round 774 to the nearest ten, look at the last digit (4). Since 4 is less than 5, round down to 770.

Front

How do you round the number 731 to the nearest hundred?

Back

To round 731 to the nearest hundred, look at the last two digits (31). Since 31 is less than 50, round down to 700.

Front

What is the rule for rounding numbers ending in 5?

Back

When rounding numbers that end in 5, the common rule is to round up to the next whole number.