Estimate Sums & Differences

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 round a number to the nearest thousand?

Back

To round to the nearest thousand, look at the hundreds digit. If it is 5 or more, round up; if it is 4 or less, round down.

Front

Estimate the difference of 7,900 - 2,999 by rounding to the nearest thousand.

Back

5,000

Front

Estimate the sum of 38,674 + 83,102 by rounding to the nearest thousand.

Back

122,000

Front

Estimate the difference of 6,375 - 1,890 by rounding to the nearest thousand.

Back

4,000

Front

Estimate the sum of 163,762 + 3,210 by rounding to the nearest thousand.

Back

167,000

Front

Estimate the sum of 7,538 + 2,317 by rounding to the nearest hundred.

Back

9,800

Front

What is the purpose of estimating sums and differences?

Back

Estimating sums and differences helps to quickly assess the reasonableness of answers and simplifies calculations.

Front

What is rounding?

Back

Rounding is the process of adjusting the digits of a number to make it simpler while keeping its value close to the original.

Front

When estimating, why is it important to choose the right place value to round to?

Back

Choosing the right place value helps to achieve a more accurate estimate based on the context of the problem.