Mastering Multiplication and Division of Whole Numbers

This video tutorial teaches how to multiply three-digit numbers by two-digit numbers. It begins with an introduction to the concept, followed by a detailed example of multiplying 372 by 89. The tutorial then applies this method to a real-world scenario involving book printing, calculating the total number of books printed over several days. Finally, another example is provided using paper towel rolls to reinforce the multiplication process. The video aims to enhance understanding and proficiency in performing these calculations.

Why is it important to rewrite the multiplication problem vertically?

• To make it look neat

• To align the place values correctly

• To make it easier to read

• To use more paper

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CCSS.5.NBT.B.5

What is the first step in multiplying 372 by 9?

• Add the numbers

• Multiply 2 by 9

• Multiply 7 by 9

• Multiply 3 by 9

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CCSS.4.NBT.B.5

When multiplying 372 by 80, why do we add a zero at the end?

• To account for the tens place

• To make the number bigger

• To make it easier to add

• To follow a rule

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CCSS.4.NBT.B.5

What do you do after multiplying the individual digits in a multi-digit multiplication problem?

• Divide the results

• Multiply the results again

• Add the results

• Subtract the results

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CCSS.3.OA.D.8

In the example of printing books, what is the first step in multiplying 825 by 4?

• Multiply 5 by 4

• Multiply 2 by 4

• Add the numbers

• Multiply 8 by 4

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CCSS.4.NBT.B.5

Why do we add a zero when multiplying 825 by 20?

• To make the number bigger

• To make it easier to add

• To account for the tens place

• To follow a rule

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CCSS.4.NBT.B.5

In the paper towel example, what is the first step in multiplying 102 by 5?

• Multiply 0 by 5

• Multiply 1 by 5

• Multiply 2 by 5

• Add the numbers

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CCSS.4.NBT.B.5

What is the result of multiplying 102 by 1 in the paper towel example?

• 101

• 100

• 102

• 103

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CCSS.4.NBT.B.5

What is the final step in solving a multi-digit multiplication problem?

• Multiply the results again

• Add the results

• Divide the results

• Subtract the results

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CCSS.7.EE.B.3

What is the total number of sheets in 15 rolls of paper towels if each roll has 102 sheets?

• 1530

• 1500

• 1520

• 1540

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CCSS.5.NBT.B.5