Rounding and Estimating Decimals

Front

What is rounding in mathematics?

Back

Rounding is the process of adjusting the digits of 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

How do you round a decimal to the nearest tenth?

Back

To round a decimal to the nearest tenth, look at the hundredths place. If it is 5 or greater, round up the tenths place by one. If it is less than 5, keep the tenths place the same.

Tags

CCSS.5.NBT.A.4

Front

What is estimating in mathematics?

Back

Estimating is the process of finding an approximate value that is close to the actual value, often used to simplify calculations.

Front

How do you estimate the sum of two decimal numbers?

Back

To estimate the sum, round each number to the nearest whole number or to a specified place value, then add the rounded numbers.

Front

What is the estimated difference of 38.2 - 4.8?

Back

The estimated difference is approximately 33.

Front

How do you round a decimal to the nearest hundredth?

Back

To round a decimal to the nearest hundredth, look at the thousandths place. If it is 5 or greater, round up the hundredths place by one. If it is less than 5, keep the hundredths place the same.

Tags

CCSS.5.NBT.A.4

Front

What is the estimated change Lina should receive after buying a hamburger for $2.96 and a milkshake for $4.06 with a $20 bill?

Back

The estimated change is approximately $13.

Front

What is the sum of 16.9 and 8.3 when estimated?

Back

The estimated sum is approximately 25.

Front

What is the process of finding the nearest whole number called?

Back

The process of finding the nearest whole number is called rounding.

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

Front

What is the importance of rounding in real-life applications?

Back

Rounding is important in real-life applications as it simplifies calculations, making it easier to make quick estimates and decisions.

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3