Whole Numbers – Chapter 2/ Extra Questions for Practice.

CBSE CLASS 6 MATHEMATICS
Whole Numbers – Chapter 2
Extra Questions for Practice – Short Answer Type Questions:


Answer the following (2 marks):


1. Write the successor of
i) 2099
ii) 100

2. Write the predecessor of
i) 1000
ii) 32098

3. Write the next three natural numbers after 2009.

4. Write the property of whole numbers used here:
(3 + 4) + 5 = 3 + (4+5)

5. Find using suitable properties:
i) 25 x 657 x 4
ii) 625 x 43256 x 16.

6. Simplify using suitable properties:
i) 243 x 45 + 55 x 243.
ii) 452 x 125 – 452 x 25.

7. Find using Distributive property:
i) 423 x 101
ii) 436 x 1001

8. Write the property of whole numbers used here:
i) 2 x 45 x 65 = 65 x 45 x 2
ii) 43 + 236 +65 = 236 + 65 + 43

9. How many whole numbers are there between 30 and 39?

10. Which of the following statements are true and which are false?
i) Zero is the smallest natural number.
ii) Zero is the smallest whole number.
iii) All natural numbers are whole numbers.
iv) All whole numbers are natural numbers.


ANSWERS:


1. i) 2099 +1 = 2100
ii) 100 +1 = 101

2. i) 1000 – 1 = 999
ii) 32098 – 1 = 32097

3. 2010, 2011, 2012.

4. Associativity under addition.

5. i) (25 x 4) x 657 = 100 x 657 = 65700.
ii) (625 x 16) x 43256 = 10000 x 43256 = 432560000.

6. i) 243 (45 + 55) = 243 x 100 = 24300.
ii) 452 (125 – 25) = 452 x 100 = 45200.

7. i) 423 (100 +1) = 423 x 100 + 423 x 1= 42300 + 423 =42723.
ii) 436 (1000 +1) = 436 x1000 + 436 x 1 = 436000 + 436 = 436436.

8. i) Commutativity under Multiplication.
ii) Commutativity under Addition.

9. There are 8 whole numbers between 30 and 39.

10. i) False
ii) True
iii) True
iv) False.

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