Estimation

Front

What is estimation?

Back

Estimation is the process of finding an approximate value or number based on reasonable assumptions or calculations.

Front

How do you estimate the difference between two numbers?

Back

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

Front

What is the best estimate of 10,556 - 5,417?

Back

6000, by rounding 10,556 to 11,000 and 5,417 to 5,000.

Front

How do you estimate a total when multiplying?

Back

Round the numbers to the nearest ten or hundred before multiplying.

Front

What is the best estimate of Lailah's earnings for 17 hours at $12 per hour?

Back

$200, by rounding 12 to 10 and 17 to 20, then calculating 10 x 20.

Front

What is a square root?

Back

A square root of a number is a value that, when multiplied by itself, gives the original number.

Front

Which number has a square root between 7 and 8?

Back

60, because 7^2 = 49 and 8^2 = 64.

Front

How do you estimate the total number of items?

Back

Round each number to the nearest hundred or thousand and then add.

Front

What is the best estimate of the total number of Aliens attending the open house?

Back

1400, by rounding the options to the nearest hundred.

Front

What is a reasonable cost estimate for multiple items?

Back

Add the estimated costs of each item and compare with the total options.