Math Adding and Subtracting Fractions

What do you do to a like fractions denominators when adding?

• Add the denominators
• Keep the denominators the same

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Why do you add fractions?

• Because you want to
• You add them because in case you are dealing with baking to get the right measurements
• Because its very fun
• Because you need something to do

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

What is 7/12+9/12?

• 15/12 or  1 1/4  
• 1/4
• 12/12
• 16/12 or 1 1/3

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

What is 1 2/5 +   3 3/10?

• 7/10
• 2 7/10
• 4 7/10

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Why do we use equivalent fractions?

• For Fun
• To add or subtract with like denominators
• No reason

Tags

CCSS.4.NF.A.1

CCSS.5.NF.B.5B

7 1/4 - 2 1/2

• 4 1/2
• 5
• 4 3/4
• I am the Anwser

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

False 3/4 - 1/2= 1/4

• Yes
• no

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

10/15-3/5

• 9/15
• I don't know
• 8/15

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2