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Knowing our Numbers - Revision Notes

  CBSE Class 6 Mathematics Revision Notes CHAPTER – 1 Knowing our Number Given two numbers, one with more digits is the greater number. If the number of digits in two given numbers is the same, that number is larger, which has a greater leftmost digit. If this digit also happens to be the same, we look at the next digit and so on. In forming numbers from given digits, we should be careful to see if the conditions under which the numbers are to be formed are satisfied. Thus, to form the greatest four-digit number from 7, 8, 3, 5 without repeating a single digit, we need to use all four digits, the greatest number can have only 8 as the leftmost digit. The smallest four-digit number is 1000 (one thousand). It follows the largest three digit number 999. Similarly, the smallest five digit number is 10,000. It is ten thousand and follows the largest four digit number 9999. Further, the smallest six digit number is 100,000. It is one lakh and follows the largest five-digit number 99,999....
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Knowing our Numbers - Solutions

  CBSE Class –VI Mathematics NCERT Solutions Chaper 1 Knowing our Numbers (Ex. 1.1) Question 1.  Fill in the blanks: (a) 1 lakh = _______________ ten thousand (b) 1 million = _______________ hundred thousand (c) 1 crore = _______________ ten lakh (d) 1 crore = _______________ million (e) 1 million = _______________ lakh Answer:   (a) 10 (b) 10 (c) 10 (d) 10 (e) 10 Question 2.  Place commas correctly and write the numerals: (a) Seventy three lakh seventy five thousand three hundred seven. (b) Nine crore five lakh forty one. (c) Seven crore fifty two lakh twenty one thousand three hundred two. (d) Fifty eight million four hundred twenty three thousand two hundred two. (e) Twenty three lakh thirty thousand ten. Answer:  (a) 73,75,307 (b) 9,05,00,041 (c) 7,52,21,302 (d) 58,423,202 (e) 23,30,010 Question 3.  Insert commas suitably and write the names according to Indian system of numeration: (a) 87595762 (b) 8546283 (c) 99900046 (d) 98432701 Answe...
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Knowing our Numbers - Worksheets

  CBSE Worksheet 01 Ch - 1 Knowing our Numbers Starting from the smallest 8-digit number, write the next five numbers in ascending order. None of these 10000000, 10000001, 10000002, 10000003, 10000004 10000001, 10000002, 10000003, 10000004, 10000005 10000004, 10000003, 10000002, 10000001, 10000000 Which is greatest? 6895, 23787, 24569, 24657 24567 23787 2 4657 68 95 Insert commas suitably and write the names according to International System of Numeration: 78921092 78,921,092 None of these 7 8,92,10,92 7,89,21,092 What is the sum of 567 and 843? 8 43 1 500 1 410 567 Identify the greatest and the smallest in 2853, 7691, 9999, 12002, 124. 12202, 124 None of these 1 2202, 7691 9999, 124 Match the following- Column I Column II a. Estimation p. International System b. Billion, Million q. Rough Calculation c. Crore r. 90,030 d. Nine Thousand Thirty s. Indian System Fill in the blanks: 1 million = _____ hundred thousand. 1 crore = _____ ten lakh. 1 crore = _____ million. 1 million = ...
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Whole Numbers - Revision Notes

  CBSE Class 6 Mathematics Revision Notes CHAPTER – 2 Whole Numbers The numbers 1, 2, 3, …… which we use for counting are known as natural numbers. If you add 1 to a natural number, we get its successor. If you subtract 1 from a natural number, you get its predecessor. Every natural number has a successor. Every natural number except 1 has a predecessor. If we add the number zero to the collection of natural numbers, we get the collection of whole numbers. Thus, the numbers 0, 1, 2, 3, ... form the collection of whole numbers. Every whole number has a successor. Every whole number except zero has a predecessor. All natural numbers are whole numbers, but all whole numbers are not natural numbers. We take a line, mark a point on it and label it 0. We then mark out points to the right of 0, at equal intervals. Label them as 1, 2, 3, .... Thus, we have a number line with the whole numbers represented on it. We can easily perform the number operations of addition, subtraction and multip...
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Whole Numbers - Solutions

  CBSE Class –VI Mathematics NCERT Solutions Chaper 2 Whole Numbers (Ex. 2.1) Question 1.  Write the next three natural numbers after 10999. Answer:   10,999 + 1 = 11,000 11,000 + 1 = 11,001 11,001 + 1 = 11,002 Question 2.  Write the three whole numbers occurring just before 10001. Answer:  10,001 – 1 = 10,000 10,000 – 1 = 9,999 9,999 – 1 = 9,998 Question 3.  Which is the smallest whole number? Answer:  ‘0’ (zero) is the smallest whole number. Question 4.  How many whole numbers are there between 32 and 53? Answer:  53 – 32 – 1 = 20 There are 20 whole numbers between 32 and 53. Question 5.  Write the successor of: (a) 2440701 (b) 100199 (c) 1099999 (d) 2345670 Answer:  (a) Successor of 2440701 is 2440701 + 1 = 2440702 (b) Successor of 100199 is 100199 + 1 = 100200 (c) Successor of 1099999 is 1099999 + 1 = 1100000 (d) Successor of 2345670 is 2345670 + 1 = 2345671 Question 6.  Write the predecessor of: (a) 94 (b) 10000 (c) 2...
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