Multiplying Decimals by Powers of 10

The video tutorial explains how to calculate the cost of a roll of 1,000 postage stamps, each costing $0.44. It demonstrates two methods: a quick method using decimal movement and a traditional method using multiplication. The tutorial verifies the results of both methods, ensuring accuracy in the calculation process.

What is the cost of a single postage stamp?

• $0.50

• $0.44

• $0.40

• $0.60

How much would 10 stamps cost if one stamp is $0.44?

• $44.00

• $4.40

• $4.00

• $0.44

What is the cost of 100 stamps?

• $4.40

• $44.00

• $440.00

• $4,400.00

How do you calculate the cost of 1,000 stamps using the faster method?

• Multiply $0.44 by 10

• Multiply $0.44 by 1,000

• Multiply $0.44 by 100

• Multiply $0.44 by 10,000

What is the cost of 1,000 stamps using the faster method?

• $44.00

• $440.00

• $4,400.00

• $44,000.00

What is the first step in the traditional multiplication method?

• Multiply 4 by 0

• Multiply 0.44 by 100

• Multiply 4 by 1,000

• Multiply 0.44 by 10

What is the result of 4 times 1,000 in the traditional method?

• 400

• 40

• 4,000

• 4

How many decimal places should be in the final answer when multiplying 1,000 by 0.44?

• 0

• 1

• 2

• 3

What is the final cost of 1,000 stamps using the traditional method?

• $44.00

• $440.00

• $4,400.00

• $44,000.00

Why do we need to consider the decimal places in the final answer?

• To avoid errors in addition

• To make the number smaller

• To make the number larger

• To ensure accuracy