Adding and Subtracting Fractions with Like-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 for fractions to have like denominators?

Back

Fractions have like denominators when they share the same denominator, allowing for direct addition or subtraction of their numerators.

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Front

How do you add fractions with like denominators?

Back

To add fractions with like denominators, keep the denominator the same and add the numerators together.

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Front

How do you subtract fractions with like denominators?

Back

To subtract fractions with like denominators, keep the denominator the same and subtract the numerators.

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Front

What is the first step in adding or subtracting fractions?

Back

The first step is to ensure that the fractions have like denominators.

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Front

Can you add or subtract fractions with different denominators directly?

Back

No, you must first find a common denominator before adding or subtracting fractions with different denominators.

Tags

CCSS.7.NS.A.1C

Front

What is a common denominator?

Back

A common denominator is a shared multiple of the denominators of two or more fractions, allowing them to be added or subtracted.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is the least common denominator (LCD)?

Back

The least common denominator (LCD) is the smallest common multiple of the denominators of two or more fractions.

Front

How do you find the least common denominator?

Back

To find the least common denominator, list the multiples of each denominator and identify the smallest multiple that appears in both lists.

Front

What happens if you add or subtract fractions with unlike denominators without finding a common denominator?

Back

You will get an incorrect result because the fractions are not equivalent.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2