Estimating Sums and Differences of Fractions

Front

What is a fraction?

Back

A fraction represents a part of a whole and consists of a numerator (top number) and a denominator (bottom number).

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

Front

What does it mean to estimate a sum of fractions?

Back

Estimating a sum of fractions involves rounding the fractions to the nearest whole number or simple fraction to make the addition easier.

Front

How do you add fractions with different denominators?

Back

To add fractions with different denominators, find a common denominator, convert the fractions, and then add the numerators.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is the sum of 1/8 and 4/5 when estimated?

Back

About 1 cup.

Front

What is the estimated total distance hiked by the scouts if they hiked 4/5 mile and 1/4 mile?

Back

About 1 mile.

Front

What is the estimated sum of 2/9 and 7/8?

Back

1.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is the estimated sum of 4/5 and 5/9?

Back

About 1 1/2.

Front

If Dustin buys 9/10 yard of fabric and uses 3/8 yard, how much fabric does he have left after buying 7/8 yard more?

Back

About 1 1/2 yards.

Tags

CCSS.7.NS.A.3

Front

What is the process of finding a common denominator?

Back

To find a common denominator, identify the least common multiple (LCM) of the denominators.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is the importance of estimating in math?

Back

Estimating helps to quickly assess the reasonableness of an answer and simplifies calculations.