Estimation and Multiplication Techniques

This video tutorial provides practice in estimating multiplication results. It begins with an introduction to the concept of estimation using a squiggly equal sign to denote approximate equality. The video then presents three examples: estimating 58 times 6 by rounding 58 to 60, estimating 3 times 2890 by rounding 2890 to 3000, and estimating 5111 times 9 by rounding 5111 to 5000. Each example demonstrates how to simplify multiplication by rounding numbers to more manageable figures, emphasizing the importance of estimation in mathematical calculations.

What does the squiggly equal sign represent in estimation?

• Less than

• Approximate equality

• Exact equality

• Greater than

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CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

Which number is 58 rounded to for easier multiplication?

• 55

• 65

• 60

• 50

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CCSS.4.NBT.B.5

What is the result of 60 times 6?

• 300

• 360

• 480

• 420

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CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

What number is 2890 rounded to for estimation?

• 3500

• 3000

• 2000

• 2500

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CCSS.5.NBT.B.5

What is the result of 3 times 3000?

• 7000

• 6000

• 8000

• 9000

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CCSS.4.NBT.B.5

How is 3 times 3000 broken down for easier calculation?

• 3 times 3 times 10

• 3 times 3 times 100

• 3 times 3 times 1000

• 3 times 3 times 1

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CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

What number is 5111 rounded to for estimation?

• 4000

• 4500

• 5000

• 5500

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CCSS.5.NBT.B.5

What is the result of 5000 times 9?

• 40000

• 45000

• 50000

• 55000

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CCSS.5.NBT.B.5

How is 5000 times 9 broken down for easier calculation?

• 5 times 9 times 100

• 5 times 9 times 1000

• 5 times 9 times 10

• 5 times 9 times 1

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CCSS.4.NBT.B.5

What is the final estimated result of 5111 times 9?

• 40000

• 45000

• 55000

• 50000

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CCSS.4.NBT.B.5