Page 195 - Revised Maths Wisdom Class - 3

ANSWERS
ANSWERS

Chapter 1: Origin of Counting

Case-Study
1. (b) 2. (c) 3. (a) 4. (a)

Chapter 2: 4-Digit Numbers
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Exercise 2A
1. (a) 4291 (b) 6503 (c) 1111 (d) 9200 2. (a) Seven thousand four hundred ninety-eight.
(b) Three thousand fi ve hundred twenty-three. (c) Six thousand fi ve hundred twenty-fi ve.
(d) Four thousand fi ve hundred sixty-nine. 3. (a) 1395 (b) 2032 (c) 7379 (d) 6768
Exercise 2B

1. (a) (b) (c)

Th H T O Th H T O
Th H T O
2 7 0 8 4 3 8 7 5 5 6 9
Number → 2708 Number → 4387 Number → 5569

2. (a) (b) (c)

Th H T O
Th H T O Th H T O
6 4 3 2
2 0 9 3 8 3 7 5
Exercise 2C
1. 800, 8 2. 0, 0 3. (a) 600, 70, 8 (b) 400, 0, 9 (c) 700, 70, 7 4. (a) 2000 + 90 + 8 (b) 3000 + 100 + 80 + 9
(c) 9000 + 700 + 10 + 5 (d) 9000 + 800 + 70 + 6 (e) 7000 + 400 + 30 + 2 5. (a) 6834 (b) 4091 (c) 8534 (d) 1809
(e) 5673 6. (a) 1525 < 2510 (b) 3515 < 5315 (c) 3815 > 3518 (d) 4637 < 4763 (e) 2145 < 2415 (f) 5001 = 5001
7. (a) 3583 < 4219 < 4273 < 7518 (b) 1225 <1458 < 3625 < 4368 (c) 2509 < 3678 < 4210 < 6250
8. (a) 7013 > 6215 > 4216 > 2158 (b) 5250 > 4329 > 3576 > 2518 (c) 6053 > 5719 > 3259 > 2852
9. (a) 5346 (b) 7033 10. (a) 2351 (b) 6542 11. (a) 8234 (b) 7762 12. (a) 2131 (b) 1232
13. 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010
1011 1012 1013 1014 1015 1016 1017 1018 1019 1020
1021 1022 1023 1024 1025 1026 1027 1028 1029 1030

1031 1032 1033 1034 1035 1036 1037 1038 1039 1040
1041 1042 1043 1044 1045 1046 1047 1048 1049 1050