Estimating

Front

What is estimating?

Back

Estimating is making a close guess about a number or amount without calculating the exact answer.

Front

What does it mean to round a number?

Back

Rounding a number means adjusting it to the nearest value that is easier to work with, like the nearest ten or hundred.

Front

Estimate the sum: 50 + 25

Back

75

Front

What is half of 40?

Back

20

Front

What is 755 rounded to the nearest hundred?

Back

800

Front

If Mrs. G drives 9 miles to school, how far does she drive in total for a round trip?

Back

18 miles

Front

What is the purpose of estimation in math?

Back

Estimation helps us quickly find an approximate answer, which is useful for checking if our calculations are reasonable.

Front

How do you estimate the sum of two numbers?

Back

You can round each number to the nearest ten or hundred and then add those rounded numbers.

Front

What is the estimated sum of 3,764 + 3,851?

Back

8,000

Front

If you have 30 apples and you give away 10, how many do you have left?

Back

20 apples