Multiplying Fluently Using the Half of 10 Strategy

This lesson teaches students how to multiply fluently using the 'half of 10' strategy. It begins with a review of multiplication facts for 10s and addition doubles, which help in understanding halves. The lesson then demonstrates how to apply the strategy to multiply numbers like 5 by 4, 5 by 8, and 3 by 5, emphasizing quick and correct solutions.

What is the result of multiplying 3 by 10?

• 50

• 40

• 30

• 20

How does knowing addition doubles help in the half of 10 strategy?

• It helps in understanding multiplication by 10.

• It helps in understanding the concept of halves.

• It helps in understanding subtraction.

• It helps in understanding division.

What is half of 40?

• 15

• 25

• 30

• 20

What is the product of 5 and 4 using the half of 10 strategy?

• 20

• 10

• 25

• 15

What is the first step in using the half of 10 strategy for 5 * 8?

• Multiply 8 by 8.

• Multiply 5 by 10.

• Multiply 10 by 8.

• Multiply 5 by 8 directly.

What is the result of multiplying 5 by 8 using the half of 10 strategy?

• 30

• 45

• 35

• 40

What is the product of 3 and 5 using the half of 10 strategy?

• 10

• 18

• 12

• 15