Subtracting Fractions with Unlike Denominators Using Models

To add or subtract, two fractions must have...

• a monkey.

• unlike terms.

• common denominators.

• the same numerators.

• 3/20
• 1/1
• 3/9
• 1/9

I can add and subtract fractions with unlike denominators...

• With pictures and models

• Using strategies

• I'm still confused.

3/5 - 5/10

• 1/10

• 8/5

• 1/5

• 8/0

• 1/12
• 1
• 2/35
• 23/25

• 1/12
• 1
• 2/35
• 23/25

5/8 - 3/4 =

• 1/8

• 6/8

• 13/8

• 7/8

1 1/4 - 2/3 =

• 5/12

• 7/12

• 23/12

• 8/12

3/4 - 2/10

• 11/20

• 9/10

• 11/24

• 9/4

8/9 - 1/3 = 

• 7/6

• 5/9

• 2/3

• 8/27