Class Notes NCERT Solutions for CBSE Students
Large Numbers
Question: (a) Write the number that is 1,00,000 less than:
(i) 65,78,975 (ii) 71,71,940 (iii) 10,45,701 (iv) 3,70,238 (v) 1,50,987
Answer: (i) 64,78,975 (ii) 70,71,0940 (iii) 9,45,701 (iv) 2,70,238 (v) 50,987
(b)Write the number that is 10,00,000 more than:
(i) 19,78,098 (ii) 2,59,894 (iii) 36,789 (iv) 78,98,509 (v) 89,99,999
Answer: (i) 29,78,098 (ii) 12,59,894 (iii) 10,36,789 (iv) 88,98,509 (v) 99,99,999
Question: Rewrite the following numbers in ascending order and then in descending order.
(a) 4,78,098 4,87,678 4,76,908 4,87,876
Answer: Ascending order: 4,78,098 → 4,76,908 → 4,87,678 → 4,87,876
Descending order: 4,87,876 → 4,87,678 → 4,76,908 → 4,78,098
(b) 21,67,654 21,76,654 21,67,456 21,67,564
Answer: Ascending order: 21,67,456 → 21,67,564 → 21,67,654 → 21,76,654
Descending order: 21,76,654 → 21,67,654 → 21,67,564 → 21,67,456
Question: Write the place value, the place and the period of the digit 4 in these numbers.
(a) 34,78,987 (b) 23,84,097 (c) 42,76,901 (d) 3,45,763 (e) 7,58,462 (f) 9,13,624
Answer: (a) Place value: 4,00,000; Place: Lakhs; Period: lakhs
(b) Place value: 4000; Place: Thousands; Period: Thousands
(c) Place value: 40,00,000; Place: Lakhs; Period: Lakhs
(d) Place value: 40,000; Place: Thousands; Period: Thousands
(e) Place value: 400; Place: Hundreds; Period: Ones
(f) Place value: 4; Place: Ones; Period: Ones
Question: (a) Which are the greatest and smallest numbers you can from using the digits 2, 6, 7, 9, o and 5?
Answer: Greatest number:976520; Smallest numbers: 205679
(b) Which is the smallest 6-digit number?
Answer: 1,00,000
(c) Which is the biggest 7-digit number?
Answer: 99,99,999
(d) 10 ten thousands is the same as which number?
Answer: 1 lakh
(e) What number has 3 in the hundreds place, 5 in the ten thousands place, 9 in the ten lakhs place, 2 in the tens place, 1 in the thousands place and 0 in all the other places?
Answer: 90,51,320
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