Adding Fractions Same Denominator

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

• the numerator

• the denominator

• nothing

• everything

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

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

• stay the same

• are added together

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

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

• 3

• 4

• 7

• 12

How can you find a common denominator?

• Add the denominators together

• Pick your favorite number

• Find a common multiple for the two denominators

Solve for J.

• 8/10

• 10/10

• 9/10

• 1 whole

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Solve for F.

• 12/12

• 11/12

• 9/12

• 1 whole

Tags

CCSS.4.NF.B.3A

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

What is the sum of these fractions in lowest terms?

• 5/12

• 5/24

• 6/12

• 6/144

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

What is the sum of these fractions in lowest terms?

• 7/18

• 7/9

• 12/9

• 12/81

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Tags

CCSS.4.NF.B.3A