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answers

Chapter 1. Numbers up to 999 Practice Time 1E
GET READY! 1. (a) < (b) > (c) < (d) > (e) =
1. Tens Ones Tens Ones Ten; Thirteen 2. (f) = (g) > (h) <
Any number from 201 to 211.
1 0 1 3 3. 8; 992, 993, 994, 995, 996, 997, 998, 999
2. Greatest 2-digit number = 88 4. (b) 612 (c) 499
Smallest 2-digit number = 55 5. (b) 256 (c) 148
Life Skills Practice Time 1F
Service Fire AMBULANCE Disaster Traffic Indian Railway’s 1. (a) 75, 87, 120, 163, 266 (b) 45, 142, 182, 215, 276
Management Police Security Helpline (c) 110, 112, 180, 243, 271 (d) 113, 119, 145, 172, 190
Contact No. 101 102 108 191 182 (e) 146, 201, 259, 263, 297
2. (a) 272, 230, 211, 98, 47 (b) 239, 218, 205, 152, 44
Practice Time 1A (c) 298, 280, 260, 245, 241 (d) 265, 200, 195, 183, 141
1. (a) 154 – One hundred fifty-four (b) 146 – One hundred forty-six (e) 298, 250, 241, 187, 136
(c) 170 – One hundred seventy 3. 567, 576, 657, 675, 756, 765; 765, 756, 675, 657, 576, 567
2. (b) One hundred fifty-two (c) One hundred sixty-six 4. (b) 749, 751 (c) 891, 892 (d) 844, 845 (e) 622, 624
(d) One hundred thirty-two (e) One hundred forty-five
(f) One hundred ninety-eight 5. Number Predecessor Successor
3. (b) 126 (c) 152 (d) 175 (e) 103 (f) 114 Greatest 910 909 911
4. 118; 104; 194; 123; 181 5. 136; 110; 174; 167; 121 Smallest 109 108 110
6. 168, 199; 116, 161; 127, 176
Practice Time 1B Practice Time 1G
1. (a) 337 – Three hundred thirty-seven (b) 858 – Eight hundred fifty-eight 1. (b) 10 toffees, even (c) 12 flowers, even (d) 9 apples, odd
3. (b) 309 (c) 659 (d) 204 (e) 855 2. 14, 16, 18, 20, 22, 24, 26, 28, 30
(f) 412 (g) 536 (h) 981 3. 29, 31, 33, 35, 37, 39, 41, 43, 45
4. (b) Four hundred fifty-seven (c) Seven hundred eighty-nine 4. (a) 32, 34, 36, 38 (b) 62, 64, 66, 68, 70, 72
(d) Five hundred thirty-four (e) Eight hundred eighty-eight 5. (a) 51, 53, 55, 57, 59 (b) 81, 83, 85, 87, 89
(f) Nine hundred ninety-nine (g) Five hundred four Practice Time 1H
(h) Seven hundred sixteen 1. (b) fourth (c) ninth (d) first (e) Ria
5. (a) 367 (b) 538 (c) 571 (d) 623 (f) Bindia (g) Akhil (h) Tony (i) Sunny
(e) 240 (f) 794 (j) Rohit
6. (a) 285 (b) 349 (c) 640 (d) 698 2. (b) 5th (c) 6th (d) 3rd
(e) 713 (f) 889 3. (a) 2nd, 7th, 13th, 17th (b) 5th, 9th, 11th, 16th
7. (a) 617 (b) 550 (c) 712 (d) 492 (c) red, purple, red, black
(e) 800 (f) 872 Mental Maths
Practice Time 1C 1.
1. (b) 650 (c) 706 (d) 895 2. (a) 98 (b) 11 (c) 101 (d) 888

(a) Store 3

(b) Store 2
Think and Answer Chapter Assessment
1. 154 2. 160 1. (b) 2. (c) 3. (a)
Practice Time 1D 4. (a) 269, 270, 271, 272, 273, 274, 275, 277, 278, 279
1. (a) 60 (b) 800 (c) 4 (b) 358, 359, 360, 361, 362, 363, 365, 366, 367, 368
2. Number Digit Place value Face value 5. (a) 748 (b) 690
6. (a) 371 = 300 + 70 + 1 (b) 719 = 700 + 10 + 9 (c) 538 = 500 + 30 + 8
(a) 215 2 200 2
1 10 1 7. (a) 157 (b) 99 (c) 65 (d) 250
5 5 5 8. (a) Ascending Order: 118, 132, 140, 172
(b) 709 7 700 7 Descending Order: 172, 140, 132, 118
0 0 0 (b) Ascending Order: 128, 153, 164, 174
9 9 9 Descending Order: 174, 164, 153, 128
3. (b) 727 (c) 503 (c) Ascending Order: 213, 217, 222, 240
4. (b) 2 hundreds + 2 tens + 7 ones; 200 + 20 + 7 Descending Order: D.O.: 240, 222, 217, 213
(c) 9 hundreds + 4 tens + 5 ones; 900 + 40 + 5 (d) Ascending Order: 148, 238, 284, 298
(d) 4 hundreds + 8 tens + 0 ones; 400 + 80 + 0 or 400 + 80 Descending Order: D.O.: 298, 284, 238, 148
5. (a) 759 (b) 231 (c) 333 Brain Sizzlers
6. (a) 230 (b) 465 (c) 507 (d) 729 Mystery Number 1: 999; Mystery Number 2: 978

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