Adding and Subtracting Signed Fractions

Front

What is a common denominator?

Back

A common denominator is a number that can be used as a denominator for two or more fractions, allowing them to be added or subtracted.

Front

What is the common denominator for 2/3 and 3/4?

Back

12

Front

How do you add fractions with different signs?

Back

You subtract the absolute values of the fractions and keep the sign of the fraction with the larger absolute value.

Tags

CCSS.7.NS.A.1C

Front

What is the result of 2/6 + (-5/4)?

Back

-2 7/12

Tags

CCSS.7.NS.A.1C

Front

What is the first step when subtracting signed fractions?

Back

Keep, Change, Change.

Tags

CCSS.7.NS.A.1C

Front

What does 'Keep, Change, Change' mean in subtraction?

Back

It means to keep the first fraction, change the subtraction to addition, and change the sign of the second fraction.

Tags

CCSS.7.NS.A.1C

Front

What is the result of 4/9 + (-2/3)?

Back

-2/9

Tags

CCSS.7.NS.A.1C

Front

When adding fractions with different signs, what do you do?

Back

You subtract the numbers.

Tags

CCSS.7.NS.A.1C

Front

What is the process to find a common denominator?

Back

List the multiples of each denominator and find the smallest multiple they share.

Front

What is the result of 1/2 + (-1/4)?

Back

1/4

Tags

CCSS.7.NS.A.1C