Estimation

Front

What is estimation?

Back

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

Front

When estimating a sum, what is the goal?

Back

The goal is to find a reasonable amount rather than the exact total.

Front

What does rounding mean?

Back

Rounding is the process of adjusting a number to a nearby value that is easier to work with, often to the nearest ten, hundred, etc.

Front

What numbers do you round up to the next whole number?

Back

You round up when the digit in the next place value is 5, 6, 7, 8, or 9.

Front

Estimate the sum: 9.1 + 7.9

Back

17

Front

If Mrs. Rogers' grandma has $153 to share among three granddaughters, what is the best estimate for how much each will receive?

Back

$50

Front

Estimate the sum: 234 + 567

Back

800

Front

What is the purpose of rounding numbers in estimation?

Back

Rounding simplifies calculations and helps to quickly assess the size of numbers.

Front

What is a reasonable estimate for 49 + 32?

Back

80

Front

How do you round 76 to the nearest ten?

Back

You round 76 to 80 because 6 is greater than 5.