### Whole Numbers-Worksheets

CBSE Worksheet 01
Ch-2 Whole Numbers

1. What is the successor of 2001?
(a) 2003 (b) 2001 (c) 2002 (d) 2000
2. Which natural number has no predecessor?
1. 1
2. 2
3. None of these
4. 0
3. Which is the smallest whole number?
(a) (b) 2 (c) 1 (d) None of these
4. Study the pattern:
$×$ 8 + 1 = 9
12 $×$ 8 + 2 = 98
1. 120 $×$ 8 + 3 = 963
2. None of these
3. 123 $×$8 + 3 = 987
4. 1234 $×$ 8 + 4 = 9876
5. 460 ___ 406
1. =
2. None of these
3. >
4. <
6. Match the following
Column AColumn B
1. Commutative propertya. (a × b) × c = a × (b × c)
2. Associative Propertyb. a (b + c) = ab + ac
3. Identity for multiplicationc. a + b = b + a
4. Distributive Propertyd. a × 1 = a
7. Fill up the following:
1. Division by _____ is not defined.
2. A number remains unchanged when added to ______.
3. A number remains unchanged when multiplied to ______.
4. 13 × 100 × ________ = 1300000
8. State true or false:
1. All natural numbers are whole numbers.
2. All whole numbers are natural numbers.
3. The predecessor of a two digit number is never a single digit number.
4. 1 is the smallest whole number.
9. How many whole numbers are there between 32 and 53?
10. Are all whole numbers also natural numbers?
11. Complete pattern
1 1 = 1
11 11 = 121
111 111 = _______
1111 1111 = 1234321
12. Write the next three consecutive whole numbers of the following numbers:
1. 39359
2. 8632157
13. A taxi driver filled his car petrol tank with 40 litres of petrol on Monday. The next day, he filled the tank with 50 litres of petrol. If the petrol costs Rs.44 per litre, how much did he spend in all on petrol?
14. Find the product by suitable rearrangement:
1. 8 × 391 × 125
2. 2 × 1234 × 50
15. If you're on a diet and have a breakfast consisting of 150 calories, a lunch consisting of 350 calories, and a dinner consisting of 1000 calories, then find the sum of the calories consumed that day.
CBSE Worksheet 01
Ch-2 Whole Numbers

Answer
1. 2002
Explanation: successor of 2001 is 2002 as
1. 1
Explanation: 1 is a natural number has no predecessor as 1 -1 =0 which is not a natural number
1. 0
Explanation: smallest whole number is zero as whole number is a collecion od zero and all natural numbers. and all natural numbers are gretare than zero.
1. 123 $×$ 8 + 3 = 987
Explanation: 1 $×$ 8 + 1 = 9
12 $×$ 8 + 2 = 98
123 $×$8 + 3 = 987
As the digit of the 1st number incresing gradually like 1, 12, 123 and the last digit of equation is also increasing like 1, 2, 3 so next pattern will be 123 $×$8 + 3 = 987
And the sum is also in decreasing order like 9 ,98 , 987
So the next pattern is 123 $×$8 + 3 = 987
1. >
Explanation: 460 __>_ 406 as
1. - c
2. - a
3. - d
4. - b
1. 0
2. zero
3. 1
4. 1000
1. True
2. False, every whole number except 0 is a natural number.
3. False, the predecessor of 10 is 9.
4. True
1. There are 20 whole numbers between 32 and 53. These are 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51 and 52.
2. No, all whole numbers are not natural numbers. (0 is a whole number but not a natural number.)
3. 12321
1. The next three consecutive whole numbers of 39359 are: 39360, 39361, 39362
2. The next three consecutive whole numbers of 8632157 are: 8632158, 8632159, 8632160
4. Petrol filled on Monday = 40 litres.
Petrol filled the next day = 50 litres.
∴ Total petrol filled on the two days = 40 litres + 50 litres = 90 litres.
∴ Cost of petrol per litre = Rs.44
∴ Cost of 90 litres petrol = Rs.44 × 90 = Rs.3960.
1. 8 × 391 × 125 = 391× (125 × 8)
= 391 × 1000
= 391,000
2. 2 × 1234 × 50 =1234 × (2 × 50)
= 1234 × 100
= 123,400
5. Breakfast consisting of 150 calories.
Lunch consisting of 350 calories.
Dinner consisting of 1000 calories.
The sum of the calories consumed that day is 150 + 350 + 1000 = 1500 calories.