Adding and Subtracting Mixed Numbers Like Denominators

When I add or subtract fractions I must have _________ units.

• denominator

• numerator

• like

• unlike

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

USE SCRATCH PAPER AND SOLVE THIS WORD PROBLEM:
The classroom made cookies. They used 1 1/4 cups of white flour for the chocolate chip cookies. They used 2 1/3 cups of flour for peanut butter cookis. How much flour did they use in total?

• 3 2/7 cups

• 3 7/12 cups

• 1 1/12 cups

• 1 2/7 cups

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

7  5/8 + 4  4/8 =

• 12  5/8

• 11  3/8

• 11  1/8

• 12  1/8

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

9  7/11 + 3  2/11 =

• 13  8/11

• 12  9/11

• 12

• 11  9/11

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

6  2/5 + 4  1/5 =

• 10  4/5

• 10  3/5

• 10  1/5

• 10

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

7  4/7 - 5  2/7 =

• 2  2/7

• 2  6/7

• 12  6/7

• 2  1/7

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

5  1/7 - 2  4/7 =

• 3  4/7

• 3  3/7

• 2  4/7

• 7  5/7

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

6  2/6 + 1  2/6 =

• 7 

• 7  4/12

• 7  2/3

• 8  4/6

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

4  1/4 - 2  3/4 =

• 1  2/4

• 2  1/2

• 1  3/4

• 6  3/4

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D