Add/Subtract Unlike Fractions

(-4/9) - 2/15

• -26/45

• 35/45

• 32/45

• -27/45

Tags

CCSS.7.NS.A.1C

3/8 - (-1/4)

• 5/8

• 3/4

• 4/8

• -5/8

Tags

CCSS.7.NS.A.1C

3/5 + 1/4 = 

• 5/20

• 12/20

• 7/20

• 17/20

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the least common denominator for 1/3 and 3/4?

• 6

• 4

• 3

• 12

Add these fractions.
1/2 + 1/3 =

• 5/6

• 2/5

• 1/5

• 1

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the least common denominator you could use to subtract 1/6 and 1/4?

• 24

• 16

• 20

• 12

• 1
• 3/6
• 1/2
• 2

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

What is the the next step to finding this answer?

• Add the numerators (1+1=2)

• Multiply 12 X 1 for both fractions to find a new numerator
  

• Multiply to find each new numerator by the multiple used to get 12. (3 X1) (4 X 1)

• This is a mistake, you don't need to convert to twelfths

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

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

2/5 + 3/10

• 7/10

• 5/10

• 1/2

• 5/15

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2