Page 211 - Start Up Mathematics_4

ANSWERS

Chapter 1: Numbers beyond 9999 (f) 63,98,705 → Sixty-three lakh ninety-eight
thousand seven hundred five
Let’s Recall
1. (a) 2000 + 800 + 0 + 9 = Two thousand eight hundred (g) 89,05,678 → Eighty-nine lakh five thousand six
hundred seventy-eight
nine
(b) 6000 + 100 + 70 + 4 = Six thousand one hundred (h) 23,51,645 → Twenty-three lakh fifty-one thousand
six hundred forty-five
seventy-four
(c) 9000 + 800 + 70 + 5 = Nine thousand eight 7. (a) 23,427 → Twenty-three thousand four
hundred twenty-seven
hundred seventy-five
2. (a) 4628 (b) 397 (b) 998,916 → Nine hundred ninety-eight thousand
nine hundred sixteen only
3. (a) 6279, 6281 (b) 2009, 2011 (c) 820,756 → Eight hundred twenty thousand
(c) 9978, 9980 (d) 8348, 8350 seven hundred fifty-six
4. (a) 3245, 3250, 3255, 3260, 3265, 3270 (d) 9,087,501 → Nine million eighty-seven thousand
(b) 1060, 1070, 1080, 1090, 1100, 1110 five hundred one
(c) 8686, 8688, 8690, 8692, 8694, 8696 (e) 50,249 → Fifty thousand two hundred forty-
5. Largest 4-digit number = 8740 nine
Smallest 4-digit number is 4078 (f) 543,486 → Five hundred forty-three thousand
6. (a) < (b) > (c) > (d) > four hundred eighty-six
Exercise 1.1 (g) 4,819,675 → Four million eight hundred nineteen
thousand six hundred seventy-five
1. (a) L TTh Th H T O (b) L TTh Th H T O
(h) 645,678 → Six hundred forty-five thousand six
hundred seventy-eight
8. (a) 2,037,526 (b) 54,75,689 (c) 22,08,00,916
(d) 78,33,068 (e) 9,000,028
2. (a) 57,253 (b) 3,36,154 9. (a) ten thousand (b) 100
3. (a) Fourteen thousand two hundred sixty-nine (c) 6,205,098 (d) 6000 (e) 100
(b) Two lakh thirty-four thousand seventy-five Exercise 1.2
(c) Twenty nine thousand seven hundred eight 1. (a) 70,000 + 1,000 + 400 + 20 + 8
(d) Four lakh eighty-one thousand one hundred (b) 60,000 + 3,000 + 900 + 0 + 7
sixty-seven
4. (a) Twenty-seven thousand four hundred thirty (c) 80,000 + 9,000 + 900 + 90 + 1
(b) Nine hundred sixteen thousand seven hundred (d) 40,000 + 0 + 0 + 50 + 2
fifty-two (e) 3,00,000 + 90,000 + 2,000 + 100 + 40 + 5
(c) Thirty-five thousand eighty-nine (f) 9,00,000 + 0 + 6,000 + 700 + 80 + 4
(d) Five million seven hundred thirty-one thousand (g) 6,00,000 + 50,000 + 9,000 + 100 + 20 + 2
six hundred eighty-four (h) 5,00,000 + 80,000 + 4,000 + 0 + 90 + 6
5. (a) 50,000 (b) 5,000 2. (a) 8,73,482 (b) 8,10,954 (c) 5,03,904
(c) 500,000 (d) 5,000,000 (d) 44,026 (e) 9,657,213
6. (a) 97,638 → Ninety-seven thousand six hundred 3. (a) < (b) > (c) < (d) = (e) > (f) <
thirty-eight 4. (a) 2,697; 3,824; 3,971; 4,183; 4,281
(b) 1,21,375 → One lakh twenty-one thousand (b) 7,480; 9,984; 10,269; 10,426; 11,397
three hundred seventy-five
(c) 40,68,179 → Forty lakh sixty-eight thousand one (c) 83,462; 83,625; 84,631; 85,316; 94,940
hundred seventy-nine (d) 3,07,654; 3,19,706; 3,20,284; 3,39,513; 3,42,053
(d) 5,34,912 → Five lakh thirty-four thousand nine (e) 718,045; 4,106,219; 5,031,325; 6,125,041;
hundred twelve 6,215,104
(e) 76,209 → Seventy-six thousand two hundred 5. (a) 8,503; 8,375; 7,219; 7,128; 7,063
nine (b) 18,963; 18,432; 18,234; 17,946; 17,945

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