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NCERT 5th Class (CBSE) Mathematics: Large Numbers

NCERT 5th Class (CBSE) Mathematics: Large Numbers

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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2 comments

  1. Very nice!

  2. Very good!