Fractions with Like Denominators Adding and Subtracting

If we have common denominators and we want to add or subtract them we need to

• add/subtract the numerator and slide over the denominator.

• add/subtract the numerator and add/subtract the denominator.

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

To add or subtract fractions you must have

• Common numerators

• Common denominators

• Common multiples

• common factors

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

What is 3/4 + 1/4 = ?

• 4/4 

• 0/4

• 2/4

• 1/2

Tags

CCSS.4.NF.B.3A

2/12 + 3/12

• 5/12

• 5/24

• 6/12

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

What is 3/4 + 1/4 = ?

Mathematical Equivalence

ON

Tags

CCSS.4.NF.B.3A

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

Add 2/7 + 3/7= ?

• 4/7

• 5/7

• 5/14

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

4/6 - 1/6 = ?

• 5/6

• 1/12

• 3/6

• 5/12

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

What is 2/8 + 3/8 = ?

• 
• 
• 

Tags

CCSS.4.NF.B.3A

Kayla had 1/6 of the cake and Jim had 3/6 of the cake. How much cake did they take in total?

• 6/6

• 2/6

• 1/2

• 4/6

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D