Adding and Subtracting Fractions with Related Denominators

In adding or subtracting similar fractions, what should you do in their denominators?

• Add or subtract

• Copy

• Find their LCD

• None of these

What is the last step in adding or subtracting fractions?

• Find their LCD

• Add or subtract the whole number

• Copy the denominator

• Simplify

8  2/4 - 3  2/3=
Simplify/Reduce if needed.

• 5  2/12

• 4  5/6

• 11  1/6

• 8  2/3

What do you call the number above the fraction bar?

• denominator

• numerator

• terminator

• devisor

When adding and subtracting fractions, what needs to be the same?

• the numerator

• the denominator

• nothing

• everything

When adding or subtracting fractions with unlike denominators, what is the first step?

• Add the numerators

• Add the denominators

• Find a common denominator

When adding fractions with like denominators, the denominators....

• stay the same

• are added together

How can you find a common denominator?

• Add the denominators together

• Pick your favorite number

• Find a common multiple for the two denominators

After changing the denominator, what do you need to do to the numerator?

• Nothing

• Multiply the numerator by the same number as the denominator

• Double it

What number could be a common denominator for these two fractions?
2/3   and   3/4

• 3

• 4

• 7

• 12