Subtract Fractions and Mixed Numbers w/ Unlike Denominators

When subtracting fractions with unlike denominators using a model, what would I do first?

• Draw rows across each model so they have the same number of pieces as the LCD

• Count the number of colored pieces that are not crossed out

• Find the LCD for both fractions

• Draw a model of the two fractions

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the LCD for 4/6 - 1/2?

• 2

• 6

• 12

• 4

What is the difference shown on this fraction model?

• 7/15

• 8/24

• 9/24

• 7/24

Tags

CCSS.4.NF.B.3A

Write this fraction in lowest terms: 4/12

• 4/12

• 1/2

• 1/3

• 2/6

What is this improper fraction as a mixed number: 5/3

• 1 1/3

• 1 2/3

• 1 2/5

• 5 1/3

Write this improper fraction as a mixed number: 29/10

(a)  

What is this mixed number as an improper fraction: 5 3/8

• 43/8

• 48/8

• 53/8

• 15/8

Write this mixed number as an improper fraction: 3 3/4

(a)  

Find the difference: 7/10 - 3/5

• 4/10

• 5/10

• 1/10

• 4/5

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Subtract: 3 3/10 - 2 1/10. Choose the answer in lowest terms.

• 1 2/10

• 1 1/2

• 5 4/10

• 1 1/5

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D