Page 217 - Start Up Mathematics_5

6. (a) 234544 → Indian system: Two lakh thirty-four Word Problems
thousand five hundred forty-four 1. Indian system → 2,62,34,875 → Two crore sixty-
International system: Two hundred thirty-four two lakh thirty-four thousand eight hundred seventy-
thousand five hundred forty-four five
(b) 3458901 → Indian system: Thirty-four lakh International system → 26,234,875 → Twenty-
fifty-eight thousand nine hundred one six million two hundred thirty-four thousand eight
International system: Three million four hundred hundred seventy-five
fifty-eight thousand nine hundred one 2. Largest 8-digit number → 9,99,99,999
(c) 74533215 → Indian system: Seven crore forty- It will become smallest 9-digit number →
five lakh thirty-three thousand two hundred 10,00,00,000
fifteen 3. Smallest 9-digit number → 10,23,46,789
International system: Seventy-four million five Round off → 10,23,47,000
hundred thirty-three thousand two hundred fifteen Largest 9-digit number → 98,76,43,210
(d) 231743822 → Indian system: Twenty-three Round off → 98,76,43,000
crore seventeen lakh forty-three thousand eight 4. Smallest → 30,578, largest → 87,530
hundred twenty-two 5. 695,000 km → Six hundred ninety-five thousand
International system: Two hundred thirty-one
million seven hundred forty-three thousand eight 6. 38,44,67,000 → Thirty-eight crore forty-four lakh
hundred twenty-two sixty-seven thousand
(e) 506397451 → Indian system: Fifty crore sixty- 7. 9,000 m 8. 10,00,00,002
three lakh ninety-seven thousand four hundred 9. Indian system → 2,00,48,720
fifty-one International system → 20,048,720
International system: Five hundred six million 10. Smallest number → 30,55,669
three hundred ninety-seven thousand four Largest number → 96,65,530
hundred fifty-one 11. 1,02,34,587
12. Successor → 10,00,000, Predecessor → 9,99,998
Exercise 1.3 13. 50,68,973, 50,83,214, 51,29,860, City C
1. (a) < (b) > (c) < (d) < (e) > (f) <
2. (a) (i) < (ii) > (iii) < (iv) > Let’s Evaluate
(b) Car D (c) Car A 1. (a) 3,00,53,607 (b) 15,00,09,242 (c) 89,45,275
(d) 4,45,89,414; 2,03,45,500; 89,32,000; 13,05,382 (d) 9,09,909 (e) 67,00,00,000
3. Smallest → 12,34,578 Largest → 87,54,321 2. 23,45,479, 23,45,480, 23,45,481, 23,45,482, 23,45,483,
4. (a) 9,99,987 (b) 99,99,399 (c) 8,99,999 23,45,484
(d) 99,00,001 3. Largest → 9,99,999; smallest → 1,00,000
5. (a) 23,413 < 32,432 < 34,341 <3,22,431 4. 10,00,002 5. 9,99,995
(b) 14,004 < 40,000 < 1,41,004 < 4,10,001 6. Twenty-two crore two lakh twenty-two thousand two
(c) 5,87,431 < 6,78,301 < 8,20,091 < 75,43,891 hundred twenty-two
(d) 3,84,36,888 < 3,86,36,888 < 3,94,36,888 7. 4531: nearest 10 → 4530, nearest 100 → 4500
6. (a) 89,43,501 (b) 3,43,47,000 (c) 12,00,00,001 nearest 1000 → 5000
Exercise 1.4 8. 3,47,549
1. (a) 20 (b) 90 (c) 380 (d) 1,690 (e) 43,300 9. Indian system 4 lakh
(f) 3,85,210 34,56,779: Place value of 4 = 4,00,000
2. Nearest Nearest Nearest Place value of 6 = 6,000
Number
100 1000 10000 International system
51,357 51,400 51,000 50,000 3,456,779: Place value of 4 = 400,000 400 thousand
4,17,504 4,17,500 4,18,000 4,20,000 Place value of 6 = 6,000
9,55,724 9,55,700 9,56,000 9,60,000 Difference 3,94,000
Sum = 4,06,000
83,78,209 83,78,200 83,78,000 83,80,000
10. 500
59,10,417 59,10,400 59,10,000 59,10,000
3,76,42,555 3,76,42,600 3,76,43,000 3,76,40,000 Scratch Your Brain
3. (a) (i) (b) (iii) (c) (iv) (d) (i) (e) (iii) 1. 1,537 2. 10 3. (a)

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