Miss Robinson introduces lesson 5.5, focusing on multiplying multiples of 10 by a one-digit number. The video demonstrates two strategies: using quick pictures and place value. Examples include multiplying 4 by 30, 7 by 40, and using place value for 9 by 50 and 6 by 70. The video concludes with a summary and encouragement to choose the most efficient strategy.

What is the main focus of lesson 5.5?

• Dividing multiples of 10 by a one-digit number

• Adding multiples of 10

• Subtracting multiples of 10

• Multiplying multiples of 10 by a one-digit number

Which strategy is NOT mentioned for multiplying multiples of 10?

• Using base 10 blocks

• Using place value

• Using a calculator

• Using quick pictures

In the first example, how many groups of 30 are needed?

• 3

• 4

• 5

• 6

What does the square symbol represent in the quick picture strategy?

• 100

• 50

• 20

• 10

How many tens are there in total before regrouping in the first example?

• 13

• 12

• 11

• 10

What is the product of 4 times 30 using the quick picture method?

• 100

• 110

• 90

• 120

In the second example, how many groups of 40 are needed?

• 6

• 5

• 7

• 8

What is the product of 7 times 40 using the quick picture method?

• 280

• 300

• 260

• 240

In the place value example, what basic fact is used to multiply 9 times 50?

• 9 times 7

• 9 times 6

• 9 times 4

• 9 times 5

What is the product of 9 times 50 using place value?

• 550

• 500

• 450

• 400