Adding and Subtracting Mixed Numbers with Common Denominators

When adding or subtracting rational numbers, what must you have?

• Common Numerator

• Quick Answering Skills

• Common Numbers

• Common Denominators

Tags

CCSS.7.NS.A.1C

When adding or subtracting RATIONAL NUMBERS with LIKE DENOMINATOR denominator you should

• multiply the denominators

• add or subtract the numerators

• keep the denominator

• simplify if need

Tags

CCSS.7.NS.A.1C

Find Lowest Common Denominator & solve
1   3/7      +       7   5/11 =

• 8   68/77

• 8   68/107

• 8   10/77

• 8    8/18

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Find Lowest Common Denominator & solve
4    1/2    +   14    6/12 =

• 18   7/14

• 18   12/12

• 18   24/24

• 18

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

• 1    5/12
• 3     11/24
• 3    11/12
• 3    1/2

Tags

CCSS.7.NS.A.1C

Tags

CCSS.7.NS.A.1C

Solve

• 11 3/4

• 11 3/8

• 11

• 3/4

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

1 11/12 + 2 5/12

• 4 1/3

• 3 4/12

• 4 16/12

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

What is the sum?

• 
• 
• 
• 

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Find Lowest Common Denominator & solve
1    1/3   +    4    1/4 =

• 5    7/12

• 5    2/24

• 5    2/12

• 5    7/24

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2