Rounding Decimal Numbers

Front

What is rounding?

Back

Rounding is the process of adjusting a number to make it simpler and easier to work with, while keeping its value close to what it was.

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

Front

What does it mean to round to the nearest whole number?

Back

Rounding to the nearest whole number means adjusting a decimal number to the closest whole number. If the decimal is 0.5 or higher, round up; if it's less than 0.5, round down.

Tags

CCSS.5.NBT.A.4

Front

How do you round 4.267 to the nearest whole number?

Back

4.267 rounds to 4 because the decimal part (0.267) is less than 0.5.

Tags

CCSS.5.NBT.A.4

Front

How do you round 3.78 to the nearest whole number?

Back

3.78 rounds to 4 because the decimal part (0.78) is 0.5 or higher.

Tags

CCSS.5.NBT.A.4

Front

What does it mean to round to the nearest tenth?

Back

Rounding to the nearest tenth means adjusting a number to one decimal place. Look at the hundredths place to decide whether to round up or down.

Tags

CCSS.5.NBT.A.4

Front

How do you round 8.541 to the nearest tenth?

Back

8.541 rounds to 8.5 because the hundredths place (4) is less than 5.

Tags

CCSS.5.NBT.A.4

Front

How do you round 6.789 to the nearest hundredth?

Back

6.789 rounds to 6.79 because the thousandths place (9) is 5 or higher.

Tags

CCSS.5.NBT.A.4

Front

What is the rule for rounding up?

Back

If the digit to the right of the place you are rounding to is 5 or higher, you round up.

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

Front

What is the rule for rounding down?

Back

If the digit to the right of the place you are rounding to is less than 5, you round down.

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

Front

If a recipe calls for 1.234 cups of sugar and you can only measure whole cups, how much sugar should you use?

Back

You should use 2 cups of sugar.

Tags

CCSS.7.EE.B.3