Add and Subtract Fractions

Front

What is the process for adding fractions with different denominators?

Back

To add fractions with different denominators, first find a common denominator. Convert each fraction to an equivalent fraction with the common denominator, then add the numerators and keep the common denominator.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

How do you subtract fractions with different denominators?

Back

To subtract fractions with different denominators, find a common denominator, convert each fraction to an equivalent fraction with that denominator, then subtract the numerators and keep the common denominator.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

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

How do you simplify a fraction?

Back

To simplify a fraction, divide the numerator and the denominator by their greatest common divisor (GCD).

Front

What is the greatest common divisor (GCD)?

Back

The greatest common divisor (GCD) is the largest positive integer that divides each of the integers without leaving a remainder.

Front

What is the first step in adding the fractions 1/3 and 5/12?

Back

The first step is to find a common denominator, which in this case is 12.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

How do you convert the fraction 1/3 to have a denominator of 12?

Back

Multiply both the numerator and denominator of 1/3 by 4 to get 4/12.

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

Front

What is the result of adding 2/3 and 1/2?

Back

The result is 7/6, which can also be expressed as 1 1/6.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

If Tim has a board that is 5/6 feet long and painted 2/18 feet, how do you find out how much is left to paint?

Back

Subtract the painted length (2/18) from the total length (5/6) after converting both fractions to a common denominator.

Tags

CCSS.7.NS.A.1C

Front

What is the result of subtracting 9/20 and 1/4?

Back

The result is 1/5 after finding a common denominator and simplifying.

Tags

CCSS.7.NS.A.1C