Understanding Multiplication of Mixed Numbers

The video tutorial explores two methods to solve the problem of multiplying 2 1/4 by 3. The first method involves breaking down the mixed number into whole numbers and fractions, then using addition to find the result. The second method converts the mixed number into an improper fraction and multiplies it directly. Both methods are verified to yield the same result, demonstrating different approaches to solving the same problem.

What is the initial problem presented in the video?

• Multiplying 2 and 1/4 by 3

• Subtracting 2 and 1/4 from 3

• Adding 2 and 1/4 to 3

• Dividing 2 and 1/4 by 3

Tags

CCSS.4.NF.B.3A

In the first method, how is the mixed number 2 and 1/4 broken down?

• Into 2 and 1/2

• Into 2 and 1/3

• Into 2 and 1/4

• Into 2 and 1/5

Tags

CCSS.5.NBT.B.7

What is the sum of the whole number parts in the first method?

• 5

• 7

• 4

• 6

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

How many fourths are obtained when adding the fractional parts in the first method?

• 4/4

• 2/4

• 5/4

• 3/4

In the second method, what is 2 and 1/4 converted into?

• 8/4

• 10/4

• 9/4

• 7/4

Tags

CCSS.4.NF.B.4B

CCSS.4.NF.B.4C

What is the result of multiplying 9/4 by 3 in the second method?

• 27/4

• 30/4

• 24/4

• 18/4

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

How are the results of the two methods compared?

• By converting both to improper fractions

• By converting both to mixed numbers

• By adding them together

• By subtracting one from the other

Tags

CCSS.3.NF.A.3C

What is the equivalent of 6 in terms of fourths?

• 22/4

• 20/4

• 24/4

• 26/4

Tags

CCSS.5.NF.B.5B

What is added to 24/4 to verify the equivalence of the results?

• 1/4

• 2/4

• 3/4

• 4/4

Tags

CCSS.RI.4.7

CCSS.RI.5.7

CCSS.RI.6.7

CCSS.RL.4.7

CCSS.RL.5.7

What is the final conclusion of the video?

• The results need further verification

• The results are incorrect

• The results are equivalent

• The results are different

Tags

CCSS.RI.4.7

CCSS.RI.5.7

CCSS.RI.6.7

CCSS.RL.5.7

CCSS.RL.6.7