Estimate products of whole numbers

Estimation is used to find an approximate answer to a problem

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QUESTION OF

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Views #: 280

Questions #: 15

Time: 15 minutes

Pass Score: 80.0%

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Step

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Exam

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Estimate a Product – Front-End Rounding

2 pts

volume_mute

Use front-end rounding to estimate the product: \(59 \times 334\)

16,000

17,000

18,000

19,000

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Correct Answer

Explanation

Estimate the Product

2 pts

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Use front-end rounding to estimate: \(74 \times 488\)

28,000

32,000

35,000

40,000

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Correct Answer

Explanation

Estimate: Two-Digit Times Three-Digit

2 pts

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Use front-end rounding to estimate: \(42 \times 763\)

24,000

28,000

32,000

40,000

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Correct Answer

Explanation

Estimate: Rounding Both Factors

2 pts

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Use front-end rounding to estimate: \(88 \times 512\)

40,000

45,000

50,000

55,000

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Correct Answer

Explanation

Estimate: Three-Digit Times Four-Digit

2 pts

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Use front-end rounding to estimate: \(312 \times 4{,}876\)

1,000,000

1,500,000

2,000,000

2,500,000

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Correct Answer

Explanation

Complete the Front-End Rounding Definition

1 pts

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Both factors are rounded to their (1) place value so that all but their (2) digit is zero. Then we multiply the rounded factors.

Please drag and drop the selected option in the right place or type it instead

largest

first

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Correct Answer

Explanation

Why Do We Use Estimation?

1 pts

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Estimation is used to find:

An exact answer to a multiplication problem.

An approximate answer to a problem.

The number of zeros to attach.

The largest place value of each factor.

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Correct Answer

Explanation

Which Rounded Values Are Correct?

2 pts

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When using front-end rounding to estimate \(59 \times 334\), which rounded values are correct? Select all that apply.

\(59 \to 60\)

\(334 \to 300\)

\(59 \to 50\)

\(334 \to 330\)

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Correct Answer

Explanation

Sort the Steps of Front-End Estimation

2 pts

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Please drag and drop the options to sort them

Drag the steps for estimating a product using front-end rounding into the correct order.

Multiply the two rounded factors.

Identify the largest place value of each factor.

State that the result is an estimate.

Round each factor to its largest place value.

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Explanation

Which Estimate Is Closest to the Exact Answer?

2 pts

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The exact answer to \(67 \times 834\) is 55,878. Which front-end rounded estimate is closest?

\(70 \times 800 = 56{,}000\)

\(60 \times 800 = 48{,}000\)

\(70 \times 900 = 63{,}000\)

\(60 \times 900 = 54{,}000\)

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Correct Answer

Explanation

Estimate: 25 × 598

2 pts

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Use front-end rounding to estimate: \(25 \times 598\)

10,000

12,000

15,000

18,000

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Correct Answer

Explanation

Classify Estimates as Over or Under 10,000

2 pts

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Multiplications

×\(59 \times 334\)

×\(74 \times 488\)

×\(12 \times 456\)

×\(99 \times 87\)

Estimate over 10,000

Estimate under 10,000

After front-end rounding, drag each multiplication into the correct category.

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Explanation

Estimate: Both Three-Digit Numbers

2 pts

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Use front-end rounding to estimate: \(445 \times 789\)

280,000

320,000

350,000

400,000

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Explanation

Is the Estimate Greater or Less Than the Exact Answer?

2 pts

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For the problem \(59 \times 334\), the estimate is \(18{,}000\) and the exact answer is \(19{,}706\).

The estimate is ______ the exact answer, because both factors were rounded ______.

less than … down

greater than … up

less than … 59 up and 334 down

greater than … 59 down and 334 up

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Correct Answer

Explanation

What Is This Rounding Strategy Called?

1 pts

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Lives: 10

Your Answer (Missing Word):

When we round each factor to its largest place value before multiplying, the strategy is called front-end ______.

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Explanation

Year 6 Year 5

Estimate a Product – Front-End Rounding

Correct Answer

Explanation

Estimate the Product

Correct Answer

Explanation

Estimate: Two-Digit Times Three-Digit

Correct Answer

Explanation

Estimate: Rounding Both Factors

Correct Answer

Explanation

Estimate: Three-Digit Times Four-Digit

Correct Answer

Explanation

Complete the Front-End Rounding Definition

Correct Answer

Explanation

Why Do We Use Estimation?

Correct Answer

Explanation

Which Rounded Values Are Correct?

Correct Answer

Explanation

Sort the Steps of Front-End Estimation

Correct Answer

Explanation

Which Estimate Is Closest to the Exact Answer?

Correct Answer

Explanation

Estimate: 25 × 598

Correct Answer

Explanation

Classify Estimates as Over or Under 10,000

Correct Answer

Explanation

Estimate: Both Three-Digit Numbers

Correct Answer

Explanation

Is the Estimate Greater or Less Than the Exact Answer?

Correct Answer

Explanation

What Is This Rounding Strategy Called?

Correct Answer

Explanation

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