5.1.3 Estimation Flashcard

Front

What is estimation in mathematics?

Back

Estimation is a method used to find an approximate value that is close to the actual value, often used for simplifying calculations.

Front

How do you estimate the sum of two numbers?

Back

To estimate the sum, round each number to the nearest ten, hundred, or thousand, then add the rounded numbers.

Front

Estimate the sum of 456 and 789.

Back

1300

Front

What is the purpose of estimating sums?

Back

Estimating sums helps to quickly assess the total without needing exact calculations, useful in everyday situations.

Front

How do you estimate the product of two numbers?

Back

To estimate the product, round each number to the nearest ten or hundred, then multiply the rounded numbers.

Front

Estimate the product of 23 and 45.

Back

1000

Front

What is the importance of estimation in problem-solving?

Back

Estimation allows for quicker decision-making and helps to check the reasonableness of answers.

Front

Estimate the product of 123 and 456.

Back

50,000

Front

How do you estimate the difference between two numbers?

Back

To estimate the difference, round each number to the nearest ten, hundred, or thousand, then subtract the rounded numbers.

Front

Estimate the difference between 2345 and 1234.

Back

1000