Adding and Subtracting Mixed Numbers with Unlike Denominators

In this video, Mr. J explains how to add and subtract mixed numbers. The tutorial covers finding a common denominator, renaming fractions, and simplifying results. Two examples are provided: one for addition and one for subtraction. The video emphasizes the importance of aligning numbers vertically and checking for simplification. By the end, viewers should be able to confidently add and subtract mixed numbers.

What is the first step in adding mixed numbers?

• Find a common denominator

• Multiply the denominators

• Add the whole numbers

• Simplify the fractions

Tags

CCSS.7.NS.A.1C

To add mixed numbers with unlike denominators, what is necessary?

• Finding a common denominator

• Converting to improper fractions

• Adding the numerators only

• Multiplying the denominators

Tags

CCSS.7.NS.A.1C

What do you do if the fractions in mixed numbers can't be added directly?

• Leave them as is

• Multiply the fractions

• Find and use a common denominator

• Subtract them instead

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the least common denominator of 7 and 2?

• 7

• 9

• 14

• 10

How do you convert 1/2 to an equivalent fraction with a denominator of 14?

• 1/14

• 2/14

• 4/14

• 7/14

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

What is the final step after adding the fractions and whole numbers?

• Subtract the whole numbers

• Simplify the fraction

• Multiply the results

• Find a new common denominator

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

After finding a common denominator and adding, what should you check for in your answer?

• If the fraction can be simplified

• If the denominator can be multiplied

• If the whole number can be increased

• If the numerator equals the denominator

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the least common denominator between 12 and 4?

• 12

• 4

• 16

• 8

How do you simplify 2/12?

• 1/6

• 1/4

• 2/6

• 1/2

What is the result of 7 and 11/12 minus 2 and 3/4?

• 6 and 1/6

• 5 and 3/12

• 5 and 2/12

• 5 and 1/6

Tags

CCSS.7.NS.A.1C