Adding and Subtracting Fractions Lesson

What do you need to find before adding fractions with unlike denominators?

• A common numerator

• A common factor

• A common denominator

• A common multiple

Which of the following is the least common multiple of 9 and 3?

• 6

• 9

• 12

• 27

When adding fractions, what do you add together?

• The denominators

• The whole numbers

• Both the numerators and denominators

• The numerators

What is the LCM of 6 and 12?

• 6

• 24

• 12

• 2

When simplifying 8/20​, what is the simplest form?

• 2/5

• 3/5

• 4/5

• 5/5