Exploring Fact Fluency Techniques

The video tutorial explains how to multiply by sevens using decomposition. It introduces the concept of breaking down the number 7 into 5 and 2 to simplify multiplication. The teacher demonstrates this method with examples like 3 times 7, 6 times 7, and 9 times 7, using the distributive method and visual aids like arrays. This approach helps students understand and solve multiplication problems more easily, especially when they haven't memorized the multiplication tables.

What is one way to simplify multiplying by seven if you haven't memorized the multiplication table?

• By adding seven repeatedly

• By decomposing seven into five and two

• By subtracting seven repeatedly

• By using a calculator

Tags

CCSS.3.OA.D.9

How can you decompose 7 when multiplying 3 by 7?

• Into 3 and 4

• Into 5 and 2

• Into 6 and 1

• Into 4 and 3

Tags

CCSS.3.OA.C.7

What is the result of 3 times 5 plus 3 times 2?

• 20

• 21

• 18

• 15

Tags

CCSS.3.OA.B.5

When decomposing 7 into 5 and 2, what is 3 times 7?

• 18

• 20

• 21

• 23

Tags

CCSS.3.OA.A.1

What is 6 times 5 plus 6 times 2?

• 40

• 42

• 36

• 38

Tags

CCSS.3.OA.B.5

How do you decompose 7 when multiplying 6 by 7?

• Into 4 and 3

• Into 6 and 1

• Into 5 and 2

• Into 3 and 4

Tags

CCSS.3.OA.A.1

What is the result of 9 times 5 plus 9 times 2?

• 81

• 72

• 63

• 54

Tags

CCSS.3.OA.B.5

When decomposing 7 into 5 and 2, what is 9 times 7?

• 81

• 72

• 54

• 63

Tags

CCSS.3.OA.A.1

What is the sum of 45 and 18?

• 83

• 53

• 63

• 73

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

What method is used to simplify multiplying by seven in this tutorial?

• Associative method

• Commutative method

• Subtractive method

• Distributive method

Tags

CCSS.3.OA.B.5