Adding & Subtracting Fractions (with 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 when the bottom numbers of two or more fractions are different.

Tags

CCSS.4.NF.B.3A

Front

How do you find the least common denominator (LCD) of two fractions?

Back

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

Front

What is the least common denominator of 1/7 and 3/6?

Back

42

Front

How do you add fractions with unlike denominators?

Back

1. Find the least common denominator. 2. Convert each fraction to an equivalent fraction with the LCD. 3. Add the numerators and keep the denominator.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

Solve: ½ + ⅖

Back

9/10

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

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

Back

Find the least common denominator (LCD) of the fractions.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

Solve: 8/9 - 1/3

Back

5/9

Tags

CCSS.7.NS.A.1C

Front

What do you do with the numerators when adding fractions?

Back

You add the numerators of the equivalent fractions.

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Front

What do you do with the denominators when adding fractions?

Back

You keep the common denominator after finding the least common denominator.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2