Adding and subtracting 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 the denominator of a fraction represent?

Back

The denominator indicates how many equal parts the whole is divided into.

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

Front

What does the numerator of a fraction represent?

Back

The numerator shows how many parts of the whole are being considered.

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

Front

What is the least common multiple (LCM)?

Back

The least common multiple is the smallest number that is a multiple of two or more numbers.

Front

How do you find the least common multiple of 5 and 4?

Back

List the multiples of each number: Multiples of 5: 5, 10, 15, 20, 25...; Multiples of 4: 4, 8, 12, 16, 20...; The LCM is 20.

Front

What must be the same in order to add fractions?

Back

The denominators must be the same.

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Front

How do you add fractions with different denominators?

Back

Find a common denominator, convert the fractions, then add the numerators.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is the sum of 1/3 + 1/6?

Back

1/3 + 1/6 = 1/2.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

How do you subtract fractions?

Back

Ensure the denominators are the same, then subtract the numerators.

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Front

What is 5/12 - 1/3?

Back

5/12 - 1/3 = 1/12.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2