Estimating Sums and Differences

Front

What is estimation in mathematics?

Back

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

Front

How do you round a number to the nearest hundred?

Back

To round a number to the nearest hundred, look at the tens digit. If it is 5 or greater, round up; if it is 4 or less, round down.

Front

What is the estimated sum of 382 and 237?

Back

The estimated sum is approximately 400 + 200 = 600.

Front

How do you estimate the difference between two numbers?

Back

To estimate the difference, round both numbers to the nearest ten or hundred and then subtract.

Front

What is the estimated difference between 346 and 237?

Back

The estimated difference is approximately 400 - 200 = 200.

Front

What is the importance of estimation in real-life situations?

Back

Estimation helps in making quick calculations, budgeting, and assessing quantities without needing exact numbers.

Front

How can you estimate the total distance jogged if someone jogs different distances on different days?

Back

Round each distance to the nearest ten or hundred and then add the rounded values together.

Front

What is the estimated total distance if Michael jogged 8 miles on two days and 12 miles on one day?

Back

The estimated total distance is approximately 10 + 10 + 10 = 30 miles.

Front

What is the process of rounding numbers?

Back

Rounding numbers involves adjusting the digits of a number to make it simpler while keeping it close to the original value.

Front

What is a practical example of using estimation?

Back

Estimating the total cost of groceries before checking out to ensure it fits within a budget.