Mastering Multiplication of Whole Numbers

In this video, Mr. J continues teaching fifth-grade math, focusing on multiplying whole numbers. The tutorial covers four multiplication problems, each increasing in complexity from a 3-digit by 1-digit to a 3-digit by 3-digit problem. Mr. J emphasizes the importance of knowing multiplication facts, aligning numbers correctly, and using placeholder zeros. After completing the problems, viewers are encouraged to take a mastery check to test their skills. The video aims to build confidence in solving multiplication problems through step-by-step guidance.

What should you have ready before starting the multiplication problems?

• A textbook

• A computer

• A piece of paper and something to write with

• A calculator

What is the result of multiplying 3 by 7 in the first problem?

• 21

• 27

• 30

• 24

Why is it important to know your multiplication facts?

• To make the process easier

• To save time

• All of the above

• To avoid mistakes

In a 2-digit by 2-digit multiplication, what do you do after multiplying the first digit of the second number?

• Add the results immediately

• Write the final answer

• Move to the next problem

• Cross out the used digits and regrouped numbers

What is the value of the placeholder zero in the 2-digit by 2-digit multiplication?

• 6

• 10

• 100

• 60

What is the sum of the partial products in the 2-digit by 2-digit multiplication problem?

• 5491

• 5492

• 5490

• 5494

In a 3-digit by 2-digit multiplication, what is the value of the second digit of the second number?

• 500

• 50

• 5.0

• 5

Why is it important to keep the numbers lined up during multiplication?

• To make it easier to read

• To save space

• To avoid confusion when adding

• To make it look neat

What is the final product of the 3-digit by 2-digit multiplication problem?

• 1770032

• 177032

• 17732

• 17700

In the 3-digit by 3-digit multiplication, what is the value of the third digit of the second number?

• 20

• 2

• 200

• 2000