Understanding Postage Stamp Cost Calculation

The video tutorial explains how to calculate the cost of 1,000 postage stamps, each priced at $0.44. It demonstrates the multiplication of decimals by initially treating them as whole numbers and then adjusting for decimal places. The tutorial walks through the calculation of 1,000 times 44, resulting in 44,000, and then adjusts for the decimal to arrive at the final cost of $440. The explanation includes reasoning about the result, comparing it to half of $1,000 to validate the calculation.

What is the cost of a single postage stamp?

• $0.45

• $0.44

• $0.40

• $0.50

How many stamps are being considered for the total cost calculation?

• 1,000

• 1,500

• 500

• 2,000

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CCSS.6.NS.B.3

When multiplying decimals, what is the first step according to the video?

• Subtract the decimals

• Divide the decimals

• Ignore the decimals initially

• Add the decimals first

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CCSS.5.NBT.B.5

What is the result of multiplying 1,000 by 44?

• 4,000

• 440

• 4,400

• 44,000

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CCSS.5.NBT.B.7

How many decimal places should the final answer have?

• One

• Two

• Three

• None

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CCSS.6.RP.A.3B

What is the final cost of 1,000 stamps?

• $44,000.00

• $4,400.00

• $44.00

• $440.00

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CCSS.5.NBT.A.3B

Why does the final answer make sense in terms of being less than half of $1,000?

• Because $0.44 is equal to $1

• Because $0.44 is less than half of $1

• Because $0.44 is exactly half of $1

• Because $0.44 is more than half of $1

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CCSS.7.EE.B.3

What would be the cost if each stamp was $0.50?

• $550

• $450

• $400

• $500

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CCSS.7.EE.B.3

If the cost of a stamp was $0.40, what would be the total cost for 1,000 stamps?

• $400

• $440

• $420

• $450

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CCSS.5.NBT.A.2

What is the significance of the trailing zeros in the final answer?

• They are necessary for accuracy

• They change the value

• They are placeholders

• They add value

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CCSS.5.NBT.A.2