Adding and Subtracting Fractions - Unlike denominators

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 have unlike denominators?

Back

Unlike denominators are denominators that are not the same in two or more fractions.

Tags

CCSS.4.NF.A.2

Front

How do you find the Least Common Denominator (LCD) for two fractions?

Back

To find the LCD, list the multiples of each denominator and find the smallest multiple that they have in common.

Front

What is the first step in adding fractions with unlike denominators?

Back

Find the Least Common Denominator (LCD) for the fractions.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

How do you convert fractions to have a common denominator?

Back

Multiply the numerator and denominator of each fraction by the necessary factor to make the denominators equal.

Front

What is the formula for adding fractions?

Back

(a/b) + (c/d) = (a*d + b*c) / (b*d) where a/b and c/d are the fractions.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is the formula for subtracting fractions?

Back

(a/b) - (c/d) = (a*d - b*c) / (b*d) where a/b and c/d are the fractions.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is the Least Common Multiple (LCM)?

Back

The LCM is the smallest multiple that two or more numbers share.

Front

How do you find the LCM of two numbers?

Back

List the multiples of each number and find the smallest multiple that appears in both lists.

Front

What is an equivalent fraction?

Back

An equivalent fraction is a fraction that represents the same value as another fraction, even though the numerator and denominator are different.

Tags

CCSS.3.NF.A.3A

CCSS.3.NF.A.3B

CCSS.4.NF.A.1