This video tutorial explores how to use the knowledge of multiplying single-digit numbers to tackle multiplication problems involving two-digit numbers. It introduces the associative property of multiplication, demonstrating how numbers can be grouped differently to simplify calculations. Through examples like 5 times 18, 3 times 21, 14 times 5, and 15 times 3, the video illustrates how breaking down numbers into smaller components can make multiplication easier and more intuitive.

What is the main focus of this video tutorial?

• Dividing two-digit numbers

• Multiplying two-digit numbers using single-digit multiplication

• Subtracting two-digit numbers

• Adding two-digit numbers

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CCSS.3.OA.A.1

How can 18 be expressed to simplify the multiplication with 5?

• 1 times 18

• 4 times 4.5

• 2 times 9

• 3 times 6

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CCSS.3.OA.B.5

What property allows us to change the order of multiplication?

• Commutative Property

• Distributive Property

• Associative Property

• Identity Property

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CCSS.3.OA.B.5

What is the result of 5 times 18 using the associative property?

• 90

• 95

• 80

• 85

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CCSS.3.OA.A.1

How can 21 be expressed to simplify the multiplication with 3?

• 3 times 7

• 4 times 5

• 6 times 3

• 2 times 10

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CCSS.3.OA.B.5

What is the result of 3 times 21 using the associative property?

• 60

• 69

• 63

• 66

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CCSS.3.OA.B.5

How can 14 be expressed to simplify the multiplication with 5?

• 4 times 4

• 5 times 2

• 3 times 5

• 2 times 7

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CCSS.3.OA.B.5

What is the result of 14 times 5 using the associative property?

• 75

• 70

• 60

• 65

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CCSS.3.NBT.A.3

How can 15 be expressed to simplify the multiplication with 3?

• 5 times 3

• 6 times 2.5

• 7 times 2

• 4 times 3.75

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CCSS.3.OA.B.5

What is the result of 15 times 3 using the associative property?

• 40

• 50

• 55

• 45

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CCSS.3.OA.B.5