Adding and Subtracting Fractions-Butterfly Method

Front

What is the Butterfly Method used for?

Back

The Butterfly Method is used to add and subtract fractions with unlike denominators.

Front

What is the number on the top of a fraction called?

Back

Numerator.

Front

What is the number on the bottom of a fraction called?

Back

Denominator.

Front

How do you add fractions using the Butterfly Method?

Back

Cross-multiply the numerators and denominators, then add the results.

Front

How do you subtract fractions using the Butterfly Method?

Back

Cross-multiply the numerators and denominators, then subtract the results.

Front

Back

Front

Back

Front

Back

Front

What do you need to find before adding or subtracting fractions?

Back

A common denominator.

Front

What is a common denominator?

Back

A common denominator is a number that is a multiple of the denominators of the fractions being added or subtracted.