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Answers

Chapter 1. Numbers up to 999 Practice Time 1F
1. (a) 75, 87, 120, 163, 266 (b) 45, 142, 182, 215, 276
GET READY! (c) 110, 112, 180, 243, 271 (d) 113, 119, 145, 172, 190
1. 86 – Eighty-six 2. 87, 60 (e) 146, 201, 259, 263, 297
3. 87 is just after 86 or 87 is the successor of 86. 2. (a) 272, 230, 211, 98, 47 (b) 239, 218, 205, 152, 44
Life Skills (c) 298, 280, 260, 245, 241 (d) 265, 200, 195, 183, 141
(e) 298, 250, 241, 187, 136
Service Fire AMBULANCE Disaster Traffic Indian Railway’s 3. 567, 576, 657, 675, 756, 765; 765, 756, 675, 657, 576, 567
Management Police Security Helpline 4. (b) 749, 751 (c) 891, 892 (d) 844, 845 (e) 622, 624
Contact No. 101 102 108 191 182 5. Number Predecessor Successor
Practice Time 1A Greatest 910 909 911
1. (a) 154 – One hundred fifty-four (b) 146 – One hundred forty-six
(c) 170 – One hundred seventy Smallest 109 108 110
2. (b) One hundred fifty-two (c) One hundred sixty-six Practice Time 1G
(d) One hundred thirty-two (e) One hundred forty-five 1. (b) 10 toffees, even (c) 12 flowers, even (d) 9 apples, odd
(f) One hundred ninety-eight 2. 14, 16, 18, 20, 22, 24, 26, 28, 30
3. (b) 126 (c) 152 (d) 175 (e) 103 (f) 114 3. 29, 31, 33, 35, 37, 39, 41, 43, 45
4. 118; 104; 194; 123; 181 5. 136; 110; 174; 167; 121 4. (a) 32, 34, 36, 38 (b) 62, 64, 66, 68, 70, 72
6. 168, 199; 116, 161; 127, 176 5. (a) 51, 53, 55, 57, 59 (b) 81, 83, 85, 87, 89
Practice Time 1B Practice Time 1H
1. (a) 337 – Three hundred thirty-seven (b) 858 – Eight hundred fifty-eight 1. (b) fourth (c) ninth (d) first (e) Ria
3. (b) 309 (c) 659 (d) 204 (e) 855 (f) Bindia (g) Akhil (h) Tony (i) Sunny
(f) 412 (g) 536 (h) 981 2. (j) Rohit (c) 6th (d) 3rd
(b) 5th
4. (b) Four hundred fifty-seven (c) Seven hundred eighty-nine 3. (a) 2nd, 7th, 13th, 17th (b) 5th, 9th, 11th, 16th
(d) Five hundred thirty-four (e) Eight hundred eighty-eight (c) red, purple, red, black
(f) Nine hundred ninety-nine (g) Five hundred four Mental Maths
(h) Seven hundred sixteen 1. (a) 98 (b) 11 (c) 101 (d) 888
5. (a) 367 (b) 538 (c) 571 (d) 623 2. (a) Store 3 (b) Store 2
(e) 240 (f) 794
6. (a) 285 (b) 349 (c) 640 (d) 698 Chapter Assessment
(e) 713 (f) 889 1. (b) 2. (c) 3. (a)
7. (a) 617 (b) 550 (c) 712 (d) 492 4. (a) 269, 270, 271, 272, 273, 274, 275, 277, 278, 279
(b) 358, 359, 360, 361, 362, 363, 365, 366, 367, 368
(e) 800 (f) 872 5. (a) 748 (b) 690
Practice Time 1C 6. (a) 371 = 300 + 70 + 1 (b) 719 = 700 + 10 + 9 (c) 538 = 500 + 30 + 8
1. (a) 243 (b) 650 (c) 706 (d) 895 7. (a) 157 (b) 99 (c) 65 (d) 250
Think and Answer 8. (a) Ascending Order: 118, 132, 140, 172; D.O.: 172, 140, 132, 118
(b) Ascending Order: 128, 153, 164, 174; D.O.: 174, 164, 153, 128
1. 154 2. 160 (c) Ascending Order: 213, 217, 222, 240; D.O.: 240, 222, 217, 213
Practice Time 1D (d) Ascending Order: 148, 238, 284, 298; D.O.: 298, 284, 238, 148
1. (a) 60 (b) 800 (c) 4 Brain Sizzlers
Mystery Number 1: 999; Mystery Number 2: 978
2. Number Digit Place value Face value
(a) 215 2 200 2 Chapter 2. Addition
1 10 1 GET READY!
5 5 5 38
(b) 709 7 700 7 Think and Answer
0 0 0 14
9 9 9 Maths Fun
3. (b) 727 (c) 503 Team A Score: Nobita (7) + Gian (5) + Dorami (5) + Dekisugi (7) = 24
4. (b) 2 hundreds + 2 tens + 7 ones; 200 + 20 + 7 Team B Score: Doreamon (6) + Shizuka (2) + Jaiko (6) + Suneo (8) = 22
(c) 9 hundreds + 4 tens + 5 ones; 900 + 40 + 5 Team A is winner.
(d) 4 hundreds + 8 tens + 0 ones; 400 + 80 + 0 or 400 + 80 Practice Time 2A
5. (a) 759 (b) 231 (c) 333 1. (a) 0 (b) 48 (c) 1
6. (a) 230 (b) 465 (c) 507 (d) 729 2. (a) 35 (b) 34
Practice Time 1E 3. (b) 79 (c) 85 (d) 66
1. (a) < (b) > (c) < (d) > (e) = Practice Time 2B
(f) = (g) > (h) < 1. 57 2. 99 3. 68 4. 78
2. Any number from 201 to 211. 5. 77 6. 87 7. 69 8. 89
3. 8; 992, 993, 994, 995, 996, 997, 998, 999 Practice Time 2C
4. (b) 612 (c) 499 1. (a) 4 tens + 4 ones (b) 5 tens + 7 ones
5. (b) 256 (c) 148 (c) 7 tens + 0 ones (d) 8 tens + 1 one

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