[1 Mark Question Answer]

Question 11 Mark

Estimate the following product by rounding off the first number correct to nearest ten and the other number correct to nearest hundred:
44 x 250

Answer

44 x 250
44 to the nearest ten = 40 and, 250 to the nearest hundred = 300
∴ Required product = (40 x 300) = 12000

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Question 21 Mark

Estimate the following product by rounding off the first number correct to nearest ten and the other number correct to nearest hundred:
83 x 664

Answer

83 x 664
83 to the nearest ten = 80 and, 664 to the nearest hundred = 700
∴ Required product = (80 x 700) = 56000

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Question 31 Mark

Estimate the following product by rounding off the first number correct to nearest ten and the other number correct to nearest hundred:
72 x 258

Answer

72 x 258
72 to the nearest ten = 70 and, 258 to the nearest hundred = 300
∴ Required product = (70 x 300) = 21000

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Question 41 Mark

Estimate the following product by rounding off the first number correct to nearest ten and the other number correct to nearest hundred:
48 x 165

Answer

48 x 165
48 to the nearest ten = 50 and, 165 to the nearest hundred = 200
∴ Required product = (50 x 200) = 10000

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Question 51 Mark

Estimate the following product by rounding off the first number correct to nearest ten and the other number correct to nearest hundred:
432 x 128

Answer

432 x 128
432 to the nearest ten = 430 and, 128 to the nearest hundred = 100
∴ Required product = (430 x 100) = 43000

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Question 61 Mark

Estimate the following product by rounding off the first number correct to nearest ten and the other number correct to nearest hundred:
28 x 287

Answer

28 x 287
28 to the nearest ten = 30 and, 287 to the nearest hundred = 300
∴ Required product = (30 x 300) = 9000

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Question 71 Mark

Estimate the following product by rounding off each number to the nearest hundred :
427 x 328

Answer

427 x 328
472 to the nearest hundred = 500 and, 328 to the nearest hundred = 300
∴ Required product = (500 x 300) = 150000

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Question 81 Mark

Estimate the following product by rounding off each number to the nearest hundred :
382 x 127

Answer

382 x 127
382 to the nearest hundred = 400 and, 127 to the nearest hundred = 100
∴ Required product = (400 x 100) = 40000

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Question 91 Mark

Estimate the following product by rounding off each number to the nearest hundred :
537 x 283

Answer

537 x 283
537 to the nearest hundred = 500 and, 283 to the nearest hundred = 300
∴ Required product = (500 x 300) = 150000

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Question 101 Mark

Estimate the following product by rounding off each number to the nearest hundred :
333 x 247

Answer

333 x 247
333 to the nearest hundred = 300 and, 247 to the nearest hundred = 200
∴ Required product = (300 x 200) = 60000

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Question 111 Mark

Estimate the following product by rounding off each number to the nearest hundred :
624 x 236

Answer

624 x 236
624 to the nearest hundred = 600 and, 236 to the nearest hundred = 200
∴ Required product = (600 x 200) = 120000

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Question 121 Mark

Estimate the following product by rounding off each number to the nearest hundred :
477 x 213

Answer

477 x 213
477 to the nearest hundred = 500 and, 213 to the nearest hundred = 200
∴ Required product = (500 x 200) = 100000

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Question 131 Mark

Estimate the following product by rounding off each number to the nearest ten:
25 x 33

Answer

25 x 33
25 to the nearest ten = 30 and, 33 to the nearest ten = 30
∴ Required product = (30 x 30) = 900

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Question 141 Mark

Estimate the following product by rounding off each number to the nearest ten:
74 x 67

Answer

74 x 67
74 to the nearest ten = 70 and, 67 to the nearest ten = 70
∴ Required product = (70 x 70) = 4900

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Question 151 Mark

Estimate the following product by rounding off each number to the nearest ten:
53 x 85

Answer

53 x 85
53 to the nearest ten = 50 and, 85 to the nearest ten = 90
∴ Required product = (50 x 90) = 4500

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Question 161 Mark

Estimate the following product by rounding off each number to the nearest ten:
27 x 54

Answer

27 x 54
27 to the nearest ten = 30 and, 54 to the nearest ten = 50
∴ Required product = (30 x 50) = 1500

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Question 171 Mark

Estimate the following product by rounding off each number to the nearest ten:
63 x 38

Answer

63 x 38
63 ta the nearest ten = 60 and, 38 to the nearest ten = 40
∴ Required product = (60 x 40) = 2400

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Question 181 Mark

Estimate the following product by rounding off each number to the nearest ten:
49 x 52

Answer

49 x 52
49 to the nearest ten = 50 and, 52 to the nearest ten = 50
∴ Required product = (50 x 50) = 2500

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Question 191 Mark

Estimate the following difference to the nearest thousand:
76003 – 48399

Answer

76003 – 48399
76003 to the nearest thousand = 76000 and, 48399 to the nearest thousand = 48000
∴ Required difference = (76000 – 48000) = 28000

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Question 201 Mark

Estimate the following difference to the nearest thousand:
45974 – 38766

Answer

45974 – 38766
45974 to the nearest thousand = 46000 and, 38760 to the nearest thousand = 39000
∴ Required difference = (46000 – 39000) = 7000

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Question 211 Mark

Estimate the following difference to the nearest hundred:
6352 – 2086

Answer

6352 – 2086
6352 to the nearest hundred = 6400 and, 2086 to the nearest hundred = 2100
∴ Required difference = (6400 – 2100) = 4300

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Question 221 Mark

Estimate the following difference to the nearest hundred:
856 – 687

Answer

856 – 687
856 to the nearest hundred = 900 and, 687 to the nearest hundred = 700
∴ Required difference = (900 – 700) = 200

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Question 231 Mark

Estimate the following difference to the nearest hundred:
769 – 314

Answer

769 – 314
769 to the nearest hundred = 800 and, 314 to the nearest hundred = 300
∴ Required difference = (800 – 300) = 500

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Question 241 Mark

Estimate the following difference correct to nearest ten:
508 – 248

Answer

508 – 248
508 to the nearest ten = 510 and, 248 to the nearest ten = 250
∴ Required difference = (510 – 250) = 260

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Question 251 Mark

Estimate the following difference correct to nearest ten:
96 – 36

Answer

96 – 36
96 to the nearest ten = 100 and, 36 to the nearest ten = 40
∴ Required difference = (100 – 40) = 60

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Question 261 Mark

Estimate the following difference correct to nearest ten:
82 – 27

Answer

82 – 27
82 to the nearest ten = 80 and, 27 to the nearest ten = 30
∴ Required difference = (80 – 30) = 50

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Question 271 Mark

Estimate the sum of the following pair of numbers to the nearest thousand:
56802 and 22475

Answer

56802 and 22475
56802 to the nearest thousand = 57000 and, 22475 to the nearest thousand = 22000
∴ Required sum = (57000 + 22000) = 79000

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Question 281 Mark

Estimate the sum of the following pair of numbers to the nearest thousand:
53826 and 36455

Answer

53826 and 36455
53826 to the nearest hundred = 54000 and, 36455 to the nearest hundred = 36000
∴ Required sum = (54000 + 36000) = 90000

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Question 291 Mark

Estimate the sum of the pair of numbers to the nearest hundred:
30047 and 39287

Answer

30047 and 39287
30047 to the nearest hundred = 30000 and, 39287 to the nearest hundred = 39300
∴ Required sum = (30000 + 39300) = 69,300

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Question 301 Mark

Estimate the sum of the pair of numbers to the nearest hundred:
4230 and 2410

Answer

4230 and 2410
4230 to the nearest hundred = 4200 and, 2410 to the nearest hundred = 2400
∴ Required number = (4200 + 2400) = 6600

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Question 311 Mark

Estimate the sum of the pair of numbers to the nearest hundred:
4280 and 5295

Answer

4280 and 5295
4280 to the nearest hundred = 4300 and, 5295 to the nearest hundred = 5300
∴ Required sum = (4300 + 5300) = 9600

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Question 321 Mark

Estimate the sum of the pair of numbers to the nearest hundred:
270 and 495

Answer

270 and 495
270 to the nearest hundred = 300 and, 495 to the nearest hundred = 500
∴ Required sum = (300 + 500) = 800

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Question 331 Mark

Estimate the sum of the pair of numbers to the nearest hundred:
546 and 342

Answer

546 and 342
546 to the nearest hundred = 500 and, 342 to the nearest hundred = 300
∴ Required sum = (500 + 300) = 800

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Question 341 Mark

Estimate the sum of the pair of numbers to the nearest hundred:
336 and 782

Answer

336 and 782
336 to the nearest hundred = 300 and, 782 to the nearest hundred = 800
∴ Required sum = (300 + 800) = 1100

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Question 351 Mark

Estimate the sum of the pair of numbers to the nearest ten:
527 and 267

Answer

527 and 267
527 to the nearest ten = 530 and, 267 to the nearest ten = 270
∴ Required sum = (530 + 270) = 800

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Question 361 Mark

Estimate the sum of the pair of numbers to the nearest ten:
474 and 173

Answer

474 and 173
474 to the nearest ten = 470 and, 173 to the nearest ten = 170
∴ Required sum = (470 + 170) = 640

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Question 371 Mark

Estimate the sum of the pair of numbers to the nearest ten:
457 and 175

Answer

457 and 175
457 to the nearest ten = 460 and, 175 to the nearest ten = 180
∴ Required sum = (460 + 180) = 640

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Question 381 Mark

Estimate the sum of the pair of numbers to the nearest ten:
76 and 62

Answer

76 and 62
76 to the nearest ten = 80 and, 62 to the nearest ten = 60
∴ Required sum = (80 + 60) = 140

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Question 391 Mark

Estimate the sum of the pair of numbers to the nearest ten:
96 and 55

Answer

96 and 55
96 to the nearest ten = 100 and, 55 to the nearest ten = 60
∴ Required sum = (100 + 60) = 160

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Question 401 Mark

Estimate the sum of the pair of numbers to the nearest ten:
78 and 18

Answer

78 and 18
78 to the nearest ten = 80 and, 18 to the nearest ten = 20
∴ Required sum = (80 + 20) = 100

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Question 411 Mark

Estimate the sum of the pair of numbers to the nearest ten:
23 and 66

Answer

23 and 66
23 to the nearest ten = 20 and, 66 to the nearest ten = 70
∴ Required sum = (20 + 70) = 90

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Question 421 Mark

Estimate the sum of the pair of numbers to the nearest ten:
34 and 87

Answer

34 and 87
34 to the nearest ten = 30 and, 87 to the nearest ten = 90
∴ Required sum = (30 + 90) = 120

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Question 431 Mark

Estimate the sum of the pair of numbers to the nearest ten:
67 and 44

Answer

67 and 44
67 to the nearest ten 70 and, 44 to the nearest ten = 40
∴ Required sum (70 + 40) = 110

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Question 441 Mark

Estimate the following quotient by converting each number to the nearest ten:
843 ÷ 33

Answer

843 ÷ 33
843 ÷ 33 is (approximately to the nearest 10) equal to 840 ÷ 30 = 28

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Question 451 Mark

Estimate the following quotient by converting each number to the nearest ten:
444 ÷ 42

Answer

444 ÷ 42
444 ÷ 42 is (approximately to the nearest 10) equal to 440 ÷ 40 = 11

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Question 461 Mark

Estimate the following quotient by converting each number to the nearest ten:
355 ÷ 26

Answer

355 ÷ 26
355 ÷ 26 is (approximately to the nearest 10) equal to 360 ÷ 30 = 12

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Question 471 Mark

Estimate the following quotient by converting each number to the nearest ten:
198 ÷ 24

Answer

198 ÷ 24
198 ÷ 24 is (approximately to the nearest 10) equal to 200 ÷ 20 = 10

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Question 481 Mark

Estimate the following quotient by converting each number to the nearest ten:
77 ÷ 22

Answer

77 ÷ 22
77 ÷ 22 is (approximately to the nearest 10) equal to 80 ÷ 20 = 4

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Question 491 Mark

Estimate the following quotient by converting each number to the nearest ten:
84 ÷ 23

Answer

84 ÷ 23
84 ÷ 23 is (approximately to the nearest 10) equal to 80 ÷ 20 = 4

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Question 501 Mark

Estimate the following quotient by converting each number to the nearest ten:
87 ÷ 28

Answer

87 ÷ 28
(87 ÷ 28) is (approximately to the nearest 10) equal to 90 ÷ 30 = 3

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MATHS [1 Mark Question Answer]

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