Page 227 - Math Genius C3

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Answers

Chapter 1. Numbers up to 9999 2. Odd numbers = 2371, 8903, 3925, 8143, 9465, 2047, 9999.
Even numbers = 4628, 7132, 6000, 3784, 5828, 1116, 1358, 1000
Let's ReCaLL 3. (a) 404, 406, 408 (b) 1024, 1026, 1028 (c) 2450, 2452, 2454
1. 4. (a) 113, 115, 117 (b) 1033, 1035, 1037 (c) 4445, 4447, 4449
think tank (Page 23)
4
2. Nine hundred ninety-eight 3. 7 hundreds and 6 tens Practice time 1F
4. (a) 1 ten (b) 1 hundred (c) 100 (d) 100 (e) 99 1.
Practice time 1a 2. (a) 50, 60 (b) 70, 80 (c) 40, 50 (d) 80, 90 (e) 100, 110
(b) 40
(d) 30
(a) 20
(e) 50
(c) 90
1. (a) 1455 (b) 2033 (c) 3214 (d) 6480 (f) 50 (g) 40 (h) 60 (i) 80 (j) 80
2. (a) 5057 (b) 4102 (c) 3676 3. 79, 81, 82, 83 (Answer may vary)
4. (a) One thousand three hundred fifty-eight 4. 99, 98, 97, 101(Answer may vary)
(b) Two thousand six hundred forty-three Practice time 1G
(c) Seven thousand five 1. (a) XVI (b) XXV (c) XXXIX (d) XXVII
(d) Nine thousand seven hundred 2. (a) 18 (b) 29 (c) 37 (d) 34
5. (a) 2,168 (b) 4,099 (c) 6,411 (d) 5,600 3. (a) XXVI (b) XXXI (c) XIX (d) IX (e) XIV
Practice time 1B Chapter assessment
1. (a) 6 3 2 9 (b) 1 5 0 8 (c) 4 9 8 0 1. (a) (iv) (b) (iii) (c) (iv) (d) (i) (e) (iii)
9 8 0 (f) (ii) (g) (ii)
20 0 80 2. (a) 4016 (b) 2039 (c) 2000 (d) 3021
300 500 900 (e) 9998 (f) 8,054 (g) 140
6000 1000 4000 3. (a) One thousand two hundred thirteen
2. (a) Face Value: 3, Place Value: 30 (b) Face Value: 8, Place Value: 800 (b) Eight thousand nine hundred twenty-five
(c) Eight thousand eight hundred eighty-eight
(c) Face Value: 9, Place Value: 9000 (d) Two thousand twenty-three
3. (a) 300, 5 (b) 5000, 80 (c) 4, 2 (d) 4, 0, 5 4. (a) 8,538 (b) 9,800
4. (a) 3000 + 900 + 10 + 4 (b) 4000 + 500 + 90 5. (a) 600 (b) 8000 (c) 70
(c) 2000 + 600 + 5 (d) 7000 + 2 6. (a) > (b) > (c) <
5. (a) 4,832 (b) 7,504 (c) 5,617 (d) 9,063 7. (a) Ascending order = 5008 < 5080 < 5088 < 5800
Practice time 1C Descending order = 5800 > 5088 > 5080 > 5008
1. (a) 524 < 2193 (b) 7329 > 3279 (c) 8028 < 8208 (b) Ascending order = 7071 < 7107 < 7170 < 7701
(d) 2613 < 2631 (e) 9162 > 9126 (f) 9325 = 9325 Descending order = 7701 > 7170 > 7107 > 7071
0
2. (a) Smallest number: 2513, Largest number: 7346 8. (a) 259, 89 (b) 619, 19 (c) 8561, 3572
9.
(b) Smallest number: 2015, Largest number: 7116 10. 7304
(c) Smallest number: 5039, Largest number: 8611
(d) Smallest number: 5001, Largest number: 5101 11. Predecessor Number successor
3. (a) 5146 < 5346 < 5446 < 5846 (b) 857 < 8275 < 8725 < 9814 (a) XXIII XXIV XXV
(c) 9037 < 9073 < 9307 < 9703 (d) 267 < 967 < 2679 < 9672 (b) XXXVI XXXVII XXXVIII
4. (a) 6873 > 6738 > 6387 > 6378 (b) 8132 > 7093 > 3506 > 239 (c) IX X XI
(c) 3548 > 3458 > 1320 > 1023 (d) 6985 > 6895 > 6598 > 6589 (d) XIV XV XVI
Practice time 1D
Challenge Question (Page 27)
1. Greatest number smallest number 1844
(a) 9,731 1,379 Mental Maths (Page 27)
(b) 9,842 2,489 1. 5555 2. 7086 3. 54
4. 3111 ; 3113 ; 3115 ; 3117; 3119
(c) 7,510 1,057
Chapter 2. addition
(d) 9,774 4,779
Let's ReCaLL
(e) 6,320 2,036
1. (a) 128 (b) 917 (c) 485 (d) 339
2. (a) 4,852 (b) 9,106 2. 541
Practice time 1e Practice time 2a
1. (a) 559 (b) 598 (c) 686 (d) 745
1. Predecessor Number successor 2. (a) 779 (b) 799 (c) 797 (d) 789
5,671 5,672 5,673 (e) 687 (f) 897
8,790 8,791 8,792 think tank (Page 35)
182
998 999 1,000
94 88
4,039 4,040 4,041 46 48 40
4,989 4,990 4,991 20 26 22 18

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