Rounding Whole Numbers: Master the Rules and Practice

In this lesson, Maria and her mascot Matthew teach rounding and estimating. The video covers rounding rules, including rounding up and down, and provides examples of rounding to the nearest thousand, ten thousand, and hundred thousand. Special cases, such as rounding with nines, are also discussed. The lesson concludes with an application of estimation using rounded numbers to solve a real-world problem involving the speed of a jet airplane.

What should you look at when rounding a number to the nearest thousand?

• The digit in the tens place

• The digit in the hundreds place

• The digit in the thousands place

• The digit in the units place

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If you are rounding the number 2547 to the nearest thousand, what will the result be?

• 2000

• 2500

• 2550

• 3000

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CCSS.3.NBT.A.1

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When rounding 872,000 to the nearest hundred thousand, what is the result?

• 800,000

• 870,000

• 875,000

• 900,000

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CCSS.3.NBT.A.1

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What is the rounded value of 17,822 to the nearest thousand?

• 18,000

• 17,800

• 17,900

• 17,000

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CCSS.3.NBT.A.1

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If you round 41000 to the nearest ten thousand, what is the result?

• 40,000

• 41,000

• 42,000

• 50,000

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CCSS.3.NBT.A.1

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How do you handle rounding when the digit after the place you are rounding to is 9?

• Ignore the digit and keep the number as it is

• Increase the digit by 1 and change all following digits to zero

• Keep the digit the same and change all following digits to zero

• Decrease the digit by 1 and change all following digits to zero

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CCSS.3.NBT.A.1

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What is the rounded value of 19695 to the nearest thousand?

• 19,700

• 19,000

• 20,000

• 19,600

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CCSS.3.NBT.A.1

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When rounding 299 to the nearest hundred, what is the result?

• 200

• 300

• 250

• 290

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CCSS.3.NBT.A.1

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If you travel at a speed of 985 kilometers per hour, approximately how long will it take to travel around the Earth (40,075 kilometers)?

• 40 hours

• 39 hours

• 42 hours

• 41 hours

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CCSS.6.RP.A.3B

What is the purpose of estimation in calculations?

• To simplify calculations using rounded numbers

• To avoid using numbers

• To make calculations more complex

• To get an exact number