Adding and Subtracting Mixed Numbers with Unlike Fractions

What is ALWAYS required when adding/subtracting fractions?

• The same numerators.

• The same denominators.

• Equivalent fractions.

• Add the numerators (top parts of the fractions).

• Rewrite the fractions in the simplest form. 

• Rewrite the fractions with a common denominator. 

• Make each fraction into an improper faction. 

Solve

• 11 3/4

• 11 3/8

• 11

• 3/4

When adding mixed numbers, which do you add first?

• The whole number

• The fractions

• It doesn't matter

What is the the next step to finding this answer?

• Add the numerators (1+1=2)

• Multiply both numerators by 12 .

• Multiply the first numerator by 4 and the second numerator by 3.

• Multiply the first numerator by 3 and the second numerator by 4.

Find Lowest Common Denominator & solve
8     4/5    +    9    1/10  =

• 18   5/15

• 17   5/10

• 17   9/20

• 17   9/10

Subtraction:
Find Lowest Common Denominator & solve
8    5/7    -    7    2/3 = 

•   3/4

•  1/21

•    1/24 

•   3/24

What do you need to have when adding unlike fractions?

• common denominator

• common numerator

• common numerator and denominator

6 - 1/3

• 5 1/3

• 5 1/4

• 5 2/3

• 5 1/2

What is the sum of five-eights and two-thirds?

• 7/11

• 16/25

• 1 7/24

• 1 14/15