Estimating Fractions and Decimals Review Flashcard

Front

What is the process of rounding a decimal to the nearest whole number?

Back

To round a decimal to the nearest whole number, look at the digit in the tenths place. If it is 5 or greater, round up; if it is less than 5, round down.

Front

How do you estimate the sum of mixed numbers?

Back

To estimate the sum of mixed numbers, round each mixed number to the nearest whole number and then add the rounded values.

Front

What is the estimated sum of 15 1/3 and 22 5/6 when rounded to the nearest whole number?

Back

The estimated sum is 38.

Front

How do you find the difference between two mixed numbers?

Back

To find the difference, convert each mixed number to an improper fraction, subtract the fractions, and then convert back to a mixed number if necessary.

Front

What is the estimated difference between 45 3/4 and 18 1/3?

Back

The estimated difference is 28.

Front

What is the process for estimating the sum of fractions?

Back

To estimate the sum of fractions, round each fraction to the nearest half or whole number, then add the rounded values.

Front

How do you round a fraction to the nearest whole number?

Back

To round a fraction to the nearest whole number, compare the numerator to the denominator. If the numerator is half or more of the denominator, round up; otherwise, round down.

Front

What is the estimated sum of 9 2/5 and 14 3/5?

Back

The estimated sum is 24.

Front

What is the importance of estimating in mathematics?

Back

Estimating helps to quickly assess the reasonableness of an answer and simplifies calculations, especially when exact values are not necessary.

Front

What is the estimated sum of 7 4/5 and 11 1/10?

Back

The estimated sum is 19.