Adding and Subtracting Unlike Fractions with Regrouping

What is the first step in solving this problem? 
⅘ + ½ =

• Add the top parts of the fraction

• Rewrite the fractions in the simplest form. 

• Find a common denominator. 

• Make each fraction into an improper faction. 

Tags

CCSS.7.NS.A.1C

What must you have to add and subtract fractions?

• Common numerators

• Different numerators

• Different denominators

• Common denominators

Tags

CCSS.7.NS.A.1C

What is the least common denominator you could use to subtract 1/3 and 1/4?

• 3

• 4

• 24

• 12

• 5 1/2
• 1 1/6
• 5 5/14
• 4 19/24

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

• 5/4

• 1 1/4

• 4/4

• 4/6

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

• 4/7

• 13/12

• 1 1/12

• 4/12

Tags

CCSS.7.NS.A.1C

• 7/20

• 3/12

• 3/10

• 7/10

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

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

• a monkey.

• unlike terms.

• common denominators.

• the same numerators.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

7   1/5  -  3  4/5

• 3  1/5

•  3  4/5

• 3  2/5

• 3  3/5

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Is this a correct answer?

• Yes, the student correctly added.

• No, you cannot add unlike denominators

• No, 5 + 7 is not 12

• No, 2 + 3 is not 5

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2