CBSE Class 6 Mathematics Whole Numbers Assignment Set 10

Question. If \( a \) and \( b \) are two whole numbers then \( ab \), \( a+b \), \( a-b \) are also whole numbers. Prove by taking \( a=5 \), \( b=6 \), \( c=7 \).
Answer: Let \( a = 5 \) and \( b = 6 \).
1. \( ab = 5 \times 6 = 30 \), which is a whole number.
2. \( a+b = 5+6 = 11 \), which is a whole number.
3. \( a-b = 5-6 = -1 \), which is not a whole number.
Hence, \( ab \) and \( a+b \) are whole numbers, but \( a-b \) is not a whole number.

Question. Represent the following whole numbers on the number line:
\( 4, 0, 6, 8, 10 \)
Answer: Draw a straight line and mark a point as \( 0 \). Mark points at equal intervals to the right of \( 0 \) as \( 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 \). Highlight or circle the points corresponding to \( 0, 4, 6, 8, 10 \) on the number line.

Question. Arrange the following whole numbers in ascending order:
\( 40, 38, 45, 65, 17 \)
Answer: \( 17, 38, 40, 45, 65 \)

Question. What is the largest 5 digits whole number and smallest 4 digits whole number
Answer: Largest: \( 99999 \), Smallest: \( 1000 \)

Question. Frame the largest and the Smallest whole number from the following digits \( 9, 0, 1, 7, 3 \)
Answer: Largest: \( 97310 \), Smallest: \( 1379 \)

Question. Write the Successor of the following numbers. Also write the predecessor.
(i) \( 1000 \)
(ii) \( 1005499 \)
(iii) one million
Answer:
Successor:
(i) \( 1001 \)
(ii) \( 1005500 \)
(iii) \( 1000001 \) (or \( 1,00,0001 \))
Predecessor:
(i) \( 999 \)
(ii) \( 1005498 \)
(iii) \( 999999 \)

Question. Compare the following whole numbers by placing the symbol \( >, <, = \)
(i) \( 459 , 549 \)
(ii) \( 868 \quad 104 \)
(iii) \( 998 \quad 998 \)
Answer:
(i) \( 459 < 549 \)
(ii) \( 868 > 104 \)
(iii) \( 998 = 998 \)

Question. List 5 successive whole numbers just after \( 401092 \)
Answer: \( 401093, 401094, 401095, 401096, 401097 \)

Question. Write three consecutive whole numbers just preceding \( 654000 \)
Answer: \( 653999, 653998, 653997 \)

Question. Write the Successor of the largest 5 digit number
Answer: \( 1,00,000 \)

Question. Which whole number is not a natural number?
Answer: \( 0 \)

Question. What is the smallest Whole number. Does it have its predecessor?
Answer: \( 0 \), No.