Add and Subtract Mixed Numbers and Fractions with Like Denominators

What must you have to add and subtract fractions?

• Common numerators

• Different numerators

• Different denominators

• Common denominators

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

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

3 2/7 + 8 1/3

(a)  

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

The gas tank in Rebecca’s old car held 14 1/5 gallons. The gas tank in Rebecca’s new car holds 18 1/2 gallons. How many more gallons will the tank in Rebecca’s new car hold than her old car?

(a)  

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

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

What is the least common denominator for this problem? 3/16 + 2/4 =

• 24

• 8

• 16

• 32

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

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