Adding and Subtracting Fractions

Front

What is a fraction?

Back

A fraction represents a part of a whole. It 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 add fractions?

Back

Adding fractions means combining parts of a whole. If the denominators are the same, add the numerators. If they are different, find a common denominator first.

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Front

What does it mean to subtract fractions?

Back

Subtracting fractions means taking one part away from another. If the denominators are the same, subtract the numerators. If they are different, find a common denominator first.

Tags

CCSS.4.NF.B.3A

Front

What is a mixed number?

Back

A mixed number is a whole number combined with a fraction, like 2 1/3.

Tags

CCSS.3.NF.A.3C

Front

What is an improper fraction?

Back

An improper fraction is a fraction where the numerator is greater than or equal to the denominator, like 5/4.

Tags

CCSS.3.NF.A.3C

Front

How do you convert a mixed number to an improper fraction?

Back

Multiply the whole number by the denominator, add the numerator, and place that over the original denominator.

Front

What is a common denominator?

Back

A common denominator is a shared multiple of the denominators of two or more fractions, used to add or subtract them.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is the sum of 1/3 and 2/3?

Back

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

Tags

CCSS.4.NF.B.3A

Front

What is the sum of 3/9 and 4/9?

Back

3/9 + 4/9 = 7/9.

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Front

If Kyleigh ate 1/5 of a cookie, how much is left?

Back

If she ate 1/5, then 4/5 of the cookie is left.

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B