Rounding to 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 to make it easier to work with, typically by increasing or decreasing the number to the nearest specified place value.

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

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 is 4 or less, round down.

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

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.

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

Front

How do you round the number 276 to the nearest hundred?

Back

To round 276 to the nearest hundred, look at the last two digits (76). Since 76 is greater than 50, round up to 300.

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

Front

How do you round the number 669 to the nearest ten?

Back

To round 669 to the nearest ten, look at the last digit (9). Since 9 is greater than 5, round up to 670.

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

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.

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

Front

How do you round the number 672 to the nearest ten?

Back

To round 672 to the nearest ten, look at the last digit (2). Since 2 is less than 5, round down to 670.

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

Front

How do you round the number 752 to the nearest hundred?

Back

To round 752 to the nearest hundred, look at the last two digits (52). Since 52 is less than 50, round down to 700.

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

Front

What is the rule for rounding up when rounding to the nearest ten?

Back

The rule for rounding up when rounding to the nearest ten is that if the last digit is 5 or greater, you increase the tens digit by one and change the last digit to 0.

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

Front

What is the rule for rounding down when rounding to the nearest ten?

Back

The rule for rounding down when rounding to the nearest ten is that if the last digit is 4 or less, you keep the tens digit the same and change the last digit to 0.

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3