Estimation and Approximation

Front

What is estimation in mathematics?  

Back

Estimation is the process of finding an approximate value that is close to the actual value, often used when exact calculations are not necessary.

Front

When would you use estimation?  

Back

Estimation is used in situations where a quick answer is needed, such as budgeting, measuring, or checking the reasonableness of a calculation.

Front

What is the difference between estimation and approximation?  

Back

Estimation is often a quick calculation or guess, while approximation refers to a value that is close to the exact number, often derived through rounding or other methods.

Front

How do you round the number 67 to the nearest ten?  

Back

67 rounded to the nearest ten is 70.

Front

Estimate the sum of 48 and 27 by rounding to the nearest ten.  

Back

50 + 30 = 80 (estimated sum).

Front

What is a common method for estimating products?  

Back

Rounding each factor to the nearest whole number before multiplying them.

Front

Estimate the product of 14 and 6 by rounding.  

Back

10 × 6 = 60 (estimated product)

Front

How can you check if an answer is reasonable?  

Back

Use estimation to compare the calculated answer against a rough estimate to see if it makes sense.

Front

What is the estimated difference between 83 and 29 when rounded to the nearest ten?  

Back

80 - 30 = 50 (estimated difference)

Front

Why is it important to know how to estimate?  

Back

Estimation helps in making quick decisions, assessing the reasonableness of answers, and simplifying calculations in daily life.

them.