Estimating Products

Front

What is estimation in mathematics?

Back

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

Front

How do you estimate the product of two numbers?

Back

To estimate the product, round each number to a convenient value (usually to the nearest ten, hundred, etc.) and then multiply the rounded numbers.

Tags

CCSS.4.NBT.B.5

Front

What is the estimated product of 9,467 and 4?

Back

The estimated product is 36,000, obtained by rounding 9,467 to 9,000 and multiplying by 4.

Tags

CCSS.4.NBT.B.5

Front

What is the estimated product of 84 and 93?

Back

The estimated product is 7,200, obtained by rounding 84 to 80 and 93 to 90, then multiplying 80 by 90.

Tags

CCSS.4.NBT.B.5

Front

What is the estimated product of 5,299 and 37?

Back

The estimated product is 200,000, obtained by rounding 5,299 to 5,000 and 37 to 40, then multiplying 5,000 by 40.

Tags

CCSS.4.NBT.B.5

Front

What is the estimated product of 6 and 28?

Back

The estimated product is 180, obtained by rounding 28 to 30 and multiplying 6 by 30.

Tags

CCSS.4.NBT.B.5

Front

What is the estimated product of 3 and 772?

Back

The estimated product is 2,400, obtained by rounding 772 to 800 and multiplying 3 by 800.

Tags

CCSS.4.NBT.B.5

Front

Why is estimation useful in real-life applications?

Back

Estimation is useful because it allows for quick calculations and helps in making decisions without needing exact numbers.

Front

What are some common rounding rules for estimation?

Back

Common rounding rules include rounding up if the digit is 5 or higher and rounding down if it is 4 or lower.

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

Front

How can you check the reasonableness of an estimate?

Back

You can check the reasonableness of an estimate by comparing it to the actual product and ensuring it falls within a reasonable range.

Tags

CCSS.4.NBT.B.5