In this video, Mr. J explains how to add mixed numbers through a step-by-step example. The process involves rewriting the problem vertically, finding a common denominator by determining the least common multiple, renaming the fractions with this common denominator, and then adding both the fractional and whole number parts. The video concludes with a final answer and a reminder to check for simplification.

What is the first step in adding mixed numbers?

• Simplifying the fractions

• Rewriting the problem vertically

• Adding the whole numbers

• Finding the least common multiple

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Why do we need to find a common denominator?

• To convert mixed numbers to improper fractions

• To add the fractional parts

• To add the whole numbers

• To simplify the fractions

What is the least common multiple of 7 and 3?

• 14

• 21

• 28

• 35

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

How do you convert 2/7 to a fraction with a denominator of 21?

• Multiply both numerator and denominator by 7

• Multiply both numerator and denominator by 3

• Multiply both numerator and denominator by 21

• Multiply both numerator and denominator by 2

Tags

CCSS.3.NF.A.3A

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

What is 2/7 equivalent to when the denominator is 21?

• 5/21

• 4/21

• 6/21

• 7/21

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

How do you convert 2/3 to a fraction with a denominator of 21?

• Multiply both numerator and denominator by 21

• Multiply both numerator and denominator by 7

• Multiply both numerator and denominator by 3

• Multiply both numerator and denominator by 2

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

What is 2/3 equivalent to when the denominator is 21?

• 15/21

• 14/21

• 13/21

• 12/21

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

What is the sum of 6/21 and 14/21?

• 19/21

• 18/21

• 20/21

• 21/21

Tags

CCSS.1.OA.A.1

What is the sum of the whole numbers 5 and 4?

• 9

• 8

• 11

• 10

Is 20/21 in its simplest form?

• It needs to be simplified further

• It can be converted to a mixed number

• No

• Yes