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Answers

Chapter 1: Large Numbers 2. a. 732, 8,63,532, 78,25,216, 86,54,627
Warm Up b. 5,23,176, 20,00,413, 20,50,009, 25,00,496

1. Jaipur 2. 9,420, 2,049 3. 90,162 = 90,000 + 100 + 60 + 2 c. 69,545, 6,95,454, 69,54,521, 69,54,530,
4. Bengaluru - 11,000, Delhi - 7,000, Mumbai - 5,000, Jaipur - 4,000, d. 7,54,654, 75,46,321, 75,46,325, 75,46,452
Chennai - 3,000 3. a. 9,74,792, 87,976, 76,049, 75,959
Exercise 1A b. 5,28,781, 4,53,170, 4,52,678, 65,467
1. a. 8,34,949 b. 40,70,698 c. 66,24,411 d. 63,00,407 c. 94,00,045, 79,83,678, 79,83,667, 78,93,569
2. d. 98,64,542, 98,64,531, 98,64,521, 9,86,421
TL L TTh Th H T O
a. 3 8 9 6 2 Exercise 1D
1. a. 90 b. 350 c. 970 d. 3240
b. 3 5 6 2 4 8
c. 7 2 8 0 4 5 e. 5,050 f. 9,870 g. 78,740 h. 4,08,380
d. 2 6 3 4 2 6 1 2. a. 300 b. 500 c. 4,700 d. 9,900
e. 17,200 f. 28,800 g. 1,20,100 h. 3,18,600
e. 7 3 2 6 4 3 1
3. a. 8,000 b. 10,000 c. 2,08,000 d. 27,000
3. a. 6,85,447; Six lakh eighty-five thousand four hundred forty-seven e. 3,19,000 f. 99,000 g. 10,36,000 h. 28,67,000
b. 98,76,560; Ninety-eight lakh seventy-six thousand five hundred 4. a. i. 12,670 ii. 12,700 iii. 13,000
sixty b. i. 17,650 ii. 17,600 iii. 18,000
c. 6,00,780; Six lakh seven hundred eighty c. i. 15,890 ii. 15,900 iii. 16,000
d. 76,54,321; Seventy-six lakh fifty-four thousand three hundred d. i. 31,980 ii. 32,000 iii. 32,000
twenty-one e. i. 3,47,130 ii. 3,47,100 iii. 3,47,000
e. 7,00,529; Seven lakh five hundred twenty-nine f. i. 1,58,360 ii. 1,58,400 iii. 1,58,000
f. 99,93,427; Ninety-nine lakh ninety-three thousand four hundred g. i. 5,62,780 ii. 5,62,800 iii. 5,63,000
twenty-seven
4. 814010 ones, 81401 tens, 8140 hundreds, 814 thousands, h. i. 16,70,250 ii. 16,70,200 iii. 16,70,000
81 ten thousands, 8 lakhs 5. Number Nearest 10 Nearest 100 Nearest 1000
6. a. 358, 469, 580, 691, 802, 913, 1,024 a. 73,248 73250 73200 73,000
b. 4,050, 5,100, 6,150, 7,200, 8,250, 9,300, 10,350 b. 34,097 34,100 34,100 34,000
c. 5,504, 6,404, 7,304, 8,204, 9,104, 10,004, 10,904
d. 10,105, 10,125, 10,145, 10,165, 10,185, 10,205, 10,225 c. 1,05,789 1,05,790 1,05,800 1,06,000
e. 98,335, 98,435, 98,535, 98,635, 98,735, 98,835, 98,935 d. 27,903 27,900 27,900 28,000
f. 11,789, 11,791, 11,793, 11,795, 11,797, 11,799, 11,801 e. 1,28,991 1,28,990 1,29,000 1,29,000
g. 82,350, 83,350, 84,350, 85,350, 86,350, 87,350, 88,350
7. a. 834 b. 166 c. 365 6. 6999
7. a. 1,125, 1,132 b. 25,652, 25,735 c. 12,549, 13,499
Exercise 1B
1. a. 5,000 b. 20,000 c. 0 d. 3,000 (Answer may vary)
e. 9,00,000 f. 6,00,000 Learning Logs
2. 6,99,930 3. 6,06,000 1. a. 4 b. 5 c. 0
4. a. 8,00,000 + 50,000 + 6,000 + 400 + 30 + 1 d. 9,99,999; 1,00,000 e. 33,000
b. 70,000 + 8,000 + 900 + 80 + 7 2. a. True b. False c. False d. False
c. 70,00,000 + 6,00,000 + 90,000 + 8,000 + 700 + 60 + 5 3. a. Eighty-three lakh seventy thousand seven hundred ninety-four
d. 6,00,000 + 70,000 + 8,000 + 900 + 80 + 7 b. Seven lakh fifty-seven thousand three hundred twenty-five
e. 80,00,000 + 6,00,000 + 20,000 + 5,000 + 900 c. Eighty-seven lakh twenty-nine thousand five hundred thirty-six
f. 9,00,000 + 50,000 + 6,000 + 2 d. Two lakh two thousand twenty
5. a. 70,56,052 b. 80,74,505 c. 80,59,303 d. 69,08,072 e. Eight lakh ninety-nine thousand nine hundred seventy-seven
e. 34,05,009 f. Eighty lakh nineteen thousand five hundred twenty-seven
6. 3,05,678, 8,76,530 7. 10,35,789, 98,75,310 4. a. 69,30,719 b. 19,09,990 c. 6,07,104 d. 7,19,116
8. a. 77,74,320, 20,00,347 b. 99,99,865, 55,55,689 5. a. Ones, 40, 4 b. Lakhs, 4,00,000, 4
c. 77,77,420, 20,00,047 d. 99,99,953, 33,33,359 c. Ones, 0, 0
9. a. 13,590 b. 50,193 6. a. > b. < c. > d. =
10. a. 45,687 b. 84,657 7. a. 6,27,909, 6,27,910, 52,79,054, 62,79,056, 63,79,056
Exercise 1C b. 2,13,500, 9,98,756, 9,98,765, 23,14,992, 75,46,786, 75,64,890
1. a. > b. < c. < d. > 8. a. 10,19,923, 10,06,165, 2,63,792, 2,05,479, 1,50,358
e. = f. > b. 27,89,988, 2,13,450, 3,07,689, 2,96,545, 1,29,657

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Answers