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Rounding Off a Number - 5

Description: Rounding off a Number - 22
Number of Questions: 25
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Tags: Rounding off a Number - 22 Rounding-off Rule Rounding numbers
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Find the sum of 765.362 rounded off to the nearest thousand and 765.362 rounded off to the nearest ten.

  1. 1430

  2. 1640

  3. 1770

  4. 1870

Show answer
Correct Option: C
Explanation:

765.362 rounded off to nearest thousand is 1000. 765.362 rounded off to nearest ten is 770. Sum of both the rounded numbers = 1000 + 770 = 1770.

What is 15.87 rounded off to the nearest whole number?

  1. 20

  2. 16

  3. 15

  4. 10

Show answer
Correct Option: B
Explanation:

In 15.87 rounded off to nearest whole number is 16.

What is 754300 rounded off to the nearest hundred thousand?

  1. 800000

  2. 760000

  3. 750000

  4. 70000

Show answer
Correct Option: A
Explanation:

In number 754300, digit at hundred thousand is 7 and decider is 5 which is equal to 5. Thus, 754300 rounded off to nearest hundred thousand is 800000.

What is the difference between difference of 1375 and 888 and the difference of numbers obtained by rounding off 1375 and 888 to the nearest ten?

  1. 3

  2. 7

  3. 9

  4. 12

Show answer
Correct Option: A
Explanation:

1375 rounded off to nearest ten = 1380. 888 rounded off to nearest ten = 890. Difference of both rounded off numbers = 1380 - 890 = 490. Difference of actual numbers = 1375 - 888 = 487. Difference of values = 490 - 487 = 3.

What is 765.3682 rounded off to the nearest whole number?

  1. 760

  2. 765

  3. 766

  4. 770

Show answer
Correct Option: B
Explanation:

In number 765.3682, decider is 3 which is less than 5. Thus, 765.3682 rounded off to nearest whole number 765.

What is 222678 rounded off to the nearest hundred thousand?

  1. 200000

  2. 220000

  3. 222000

  4. 223000

Show answer
Correct Option: A
Explanation:

In 222678, digit at hundred thousand is 2 and decider is 2 which is less than 5. Thus, 222678 rounded off to hundred thousand is 200000.

What is 145302 rounded off to the nearest ten thousand?

  1. 145000

  2. 146000

  3. 150000

  4. None of these

Show answer
Correct Option: C
Explanation:

In 145302, digit at ten thousand place is 4 and decider is 5 which is equal to 5. Thus, 145302 rounded off to nearest ten thousand is 150000.

What is 7.44430 rounded off to the nearest hundredth?

  1. 7.4

  2. 7.44

  3. 7.45

  4. 7.50

Show answer
Correct Option: B
Explanation:

7.44430 rounded off the nearest hundredth = 7.44

A number 'n' when rounded off to the nearest ten becomes 460. What can be the range of the number 'n'?

  1. 400 - 454

  2. 400 - 500

  3. 455 - 459

  4. 455 - 464

Show answer
Correct Option: D
Explanation:

n = 455 - 464

What is 2.4567 rounded upto 3 decimal places?

  1. 2.45

  2. 2.456

  3. 2.457

  4. 2.4567

Show answer
Correct Option: C
Explanation:

2.4567 rounded off to 3 decimal places = 2.457

296 is rounded off to the nearest hundred and the result added to a number 'n', gives 700 as the sum. Find the value of n.

  1. 410

  2. 400

  3. 404

  4. 500

Show answer
Correct Option: B
Explanation:

296 rounded off to nearest hundred = 300 Now 300 + n = 700 300 - 300 + n = 700 - 300        (subtract 300 from both sides) n = 400

If 79.625 and 16.3924 are rounded to the nearest hundredth and subtracted, what is the difference of the numbers such obtained?

  1. 63.21

  2. 63.24

  3. 63.25

  4. 63.33

Show answer
Correct Option: B
Explanation:

79.625 rounded off to nearest hundredth = 79.63 16.3924 rounded off to nearest hundreth  = 16.39 Difference of rounded numbers = 79.63 – 16.39 = 63.24

What are the most common ways to specify when a number should be rounded off?

  1. Decimal places

  2. Significant figures

  3. Figures

  4. Both 1 and 2

Show answer
Correct Option: D
Explanation:

Decimal places & significant figures

Hazel bought a dress for £70.45. What is this cost rounded off to the nearest ten?

  1. £80

  2. £72

  3. £71

  4. £70

Show answer
Correct Option: D
Explanation:

The cost of the dress to the nearest ten would be £70.

If 7298 and 9999 are rounded to the nearest thousand and added, what is the sum of the numbers such obtained?

  1. 17,300

  2. 17,100

  3. 17,000

  4. None of these

Show answer
Correct Option: C
Explanation:

7298 rounded off to nearest thousand = 7000 999 rounded off to nearest thousand = 10000 Sum of rounded numbers = 7000 + 10000 = 17000

What is 331.227 rounded off to 2 decimal places?

  1. 331.20

  2. 331.22

  3. 331.23

  4. 331.24

Show answer
Correct Option: C
Explanation:

331.227 can be rounded as 331.23 upto 2 decimal places.

What is 327.7 rounded off to the nearest whole number?

  1. 400

  2. 330

  3. 328

  4. 327

Show answer
Correct Option: C
Explanation:

327.7 can be rounded off to 328 as the nearest whole number.

What is 5357 rounded off to 3 significant figures?

  1. 5000

  2. 5200

  3. 5300

  4. 5360

Show answer
Correct Option: D
Explanation:

5357 rounded off to 3 significant figures = 5360

A rectangle is 4.13 m long and 3.65 m wide. Find its area upto 2 decimal places.

  1. 14.72 m2

  2. 15.05 m2

  3. 15.07 m2

  4. 15.71 m2

Show answer
Correct Option: C
Explanation:

Area of rectangle = l x w                           = 4.13 x 3.65                           = 15.0745 m2     15.0745 can be rounded off to 15.07.

The side length of a square is 3.147 cm. Find its area upto 2 decimal places.

  1. 9.09 cm2

  2. 9.90 cm2

  3. 9.92 cm2

  4. 9.93 cm2

Show answer
Correct Option: B
Explanation:

Area of square = (side)2                       = (3.147)2                       = 3.147 x 3.147                       = 9.903609 cm2   9.903609 can be rounded off upto 9.90 cm2.

What is 53.4 rounded off to the nearest whole number?

  1. 50

  2. 52

  3. 53

  4. 60

Show answer
Correct Option: C
Explanation:

53.4 rounded off to nearest whole number = 53

Sandra earns a salary of £599.96 per week. What is her salary rounded off to nearest whole number?

  1. £599

  2. £600

  3. £601

  4. £602

Show answer
Correct Option: B
Explanation:

£599.96 So, add 1 more to last digit. £600 is the salary.

The price of a car is £589,457. What is the price of the car rounded off to the nearest ten thousand?

  1. £580,000

  2. £590,000

  3. £600,000

  4. £650,000

Show answer
Correct Option: B
Explanation:

£589457 rounded off to nearest ten thousand = 590000

What is 508.9 rounded off to 2 significant figures?

  1. 510

  2. 509

  3. 508

  4. 500

Show answer
Correct Option: A
Explanation:

508.9 rounded off to 2 significant figures = 510

What is 3.127 rounded off to 2 significant figures?

  1. 3.9

  2. 3.2

  3. 3.1

  4. 3.0

Show answer
Correct Option: C
Explanation:

3.127 rounded to 2 significant figures = 3.1

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