Page 216 - Start Up Mathematics_5

ANSWERS

Chapter 1: Numbers (e) 30852650 → 3,08,52,650; Three crore eight lakh
fifty-two thousand six hundred fifty
Let’s Recall
1. 3. (a) 99,99,999 (b) 1,00,00,000 (c) 10,00,002
(d) 9,89,99,999
Car Lakhs Thousands Ones Price (In Words) 4. (b) 7 ten thousand or 70,000 (c) 7 lakhs or 7,00,000
Four lakh sixty-five thousand (d) 2 crore or 2,00,00,000 (e) 0
A 4 65 343
three hundred forty-three (f) 7 ten crore or 70,00,00,000
5. Difference Sum
Seven lakh ninety thousand
B 7 90 450
four hundred fifty (a) 79,99,40,000 80,00,60,000
(b) 8,99,99,100 9,00,00,900
Eight lakh eighty thousand
C 8 80 400 (c) 5,92,000 6,08,000
four hundred
(d) 79,99,980 80,00,020
Five lakh twelve thousand 6. (a) 80,00,000 + 5,00,000 + 30,000 + 4,000 + 900 +
D 5 12 900
nine hundred 10 + 7
(b) 3,00,00,000 + 70,00,000 + 2,00,000 + 5,000 +
2. (a) 9,75,321 (b) 1,23,579 400 + 10 + 5
3. (a) A = 2,43,442 B = 2,43,444 (c) 7,00,00,000 + 80,00,000 + 2,00,000 + 50,000 +
(b) A = 2,99,999 B = 3,00,001 4,000 + 200 + 50 + 1
4. More bikes by 2,00,433 (d) 10,00,00,000 + 8,00,00,000 + 70,00,000 + 1,00,000 +
5. (b) 8 lakh or 8,00,000 (c) 9 tens or 90 30,000 + 2,000 + 800 + 10 + 5
(d) 50 thousand or 50,000 7. (a) 5,23,042 (b) 8,74,13,582 (c) 4,37,62,513
6. (a) Nine hundred thirty-two thousand four hundred (d) 23,04,70,562 (e) 83,42,723
thirty-one Exercise 1.2
(b) Thirty-seven thousand three hundred forty 1. (a) 2531786 → 2,531,786; Two million five hundred
(c) Four hundred eighty-one thousand two hundred thirty-one thousand seven hundred eighty-six
thirty-four (b) 13275196 → 13,275,196; Thirteen million two
(d) Five hundred sixteen thousand seventy-four hundred seventy-five thousand one hundred
7. 5,80,518 = 5,00,000 + 80,000 + 500 + 10 + 8 ninety-six
74,983 = 70,000 + 4,000 + 900 + 80 + 3 (c) 8203005 → 8,203,005; Eight million two hundred
three thousand five
8. (a) 4,20,817; 4,30,395; 4,52,164; 4,53,164 (d) 105327550 → 105,327,550; One hundred five
(b) 78,375; 176,240; 178,421; 275,189 million three hundred twenty-seven thousand
9. (a) 1,90,400 (b) 8,99,100 (c) 7,000 (d) 44,000 five hundred fifty
10. (a) 8,000 (b) 24,000 (c) 5,86,000 (d) 9,00,000 (e) 83005389 → 83,005,389; Eighty-three million

Exercise 1.1 five thousand three hundred eighty-nine
2. (a) 4,223,646 (b) 70,000,000 (c) 36,004,192
1. (a) 5,32,50,304 (b) 31,02,21,506 (c) 4,05,71,205 (d) 753,042,893 (e) 5,463,251
(d) 40,27,02,683 (e) 82,40,504 3. (a) 10 (b) 100 (c) 5 (d) 500 (e) 50 (f) 50
Students to draw place value chart on their own. 4. (a) 3,55,17,433 → 35,517,433; Thirty-five million
2. (a) 40530217 → 4,05,30,217; Four crore five lakh five hundred seventeen thousand four hundred
thirty thousand two hundred seventeen thirty-three
(b) 132305604 → 13,23,05,604; Thirteen crore (b) 2,00,65,790 → 20,065,790; Twenty million sixty-
twenty three lakh five thousand six hundred four five thousand seven hundred ninety
(c) 81754008 → 8,17,54,008; Eight crore seventeen (c) 4,98,264 → 498,264; Four hundred ninety-eight
lakh fifty-four thousand eight thousand two hundred sixty-four
(d) 8532562 → 85,32,562; Eighty-five lakh thirty- 5. (a) 1,000,001 (b) 9,999,999 (c) 100,001
two thousand five hundred sixty-two (d) 9,990 (e) 10,000,100 (f) 99,999,000

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