Worksheet Solution: Fun With Numbers - Notes | Study Mathematics for Class 3: NCERT - Class 3

Q.1. Fill in the blanks: The place value of ____ always remains the same.
Ans. 0

Q.2. Express each of the following as decimals and find the number of decimal places in each.
(a) 37/100
(b) 11/1000
(c) 9/100
(d) 739/10
(e) 1234/1000
(f) 495/10
Ans. (a) 0.37; 2
(b) 0.011; 3
(c) 0.09; 2
(d) 73.9; 1
(e) 1.234; 3
(f) 49.5; 1

Q.3. Round the following numbers to the nearest ten.
(a) 844
(b) 114
(c) 885
Ans. (a) 840
(b) 110
(c) 890

Q.4. Write the successor of: 99
Ans. 100

Q.5. Express each of the following as fractions in the lowest form:
(a) 18.64
(b) 0.008
(c) 165.2
(d) 0.28
(e) 3.5
Ans. (a) 466/25
(b) 1/125
(c) 826/5
(d) 7/25
(e) 7/2

Q.6. Round the following numbers to the nearest ten.
(a) 724
(b) 534
(c) 650
Ans. (a) 720
(b) 530
(c) 650

Q.7. Choose the smallest number:
(a) 654
(b) 4321
(c) 7896
(d) 6045
Ans. (a) 654

Q.8. Write each of the following as decimals:
(a) 5/100
(b) 17/10
(c) 87/1000
(d) 9/100
(e) 81/1000
(f) 2222/100
Ans. (a) 0.05
(b) 1.7
(c) 0.087
(d) 0.09
(e) 0.081
(f) 22.22

Q.9. Round the following numbers to the nearest ten.
(a) 962
(b) 245
(c) 60
Ans. (a) 960
(b) 250
(c) 60

Q.10. Choose the largest number:
(a) 234
(b) 786
(c) 432
(d) 643
Ans. (b) 786

Q.11. Express each of the following as decimals:
(a) 17/5
(b) 231/2
(c) 1297/4
(d) 347/50
(e) 1234/25
Ans. (a) 3.4
(b) 115.5
(c) 324.25
(d) 6.94
(e) 49.36

Q.12. Round the following numbers to the nearest ten.
(a) 752
(b) 799
(c) 599
Ans. (a) 750
(b) 800
(c) 600

Q.13. Guess Who I am? 
Hints: 
1) I am a 4 digit number. 
2) The digit of my hundred place is smallest 1 digit even number. 
3) The digit at my thousand place is the greatest 1 digit odd number. 
4) The digit of my ones place is just half of my digit at hundreds place. 
5) My tens place number is 7.
Ans. 9271

Q.14. Express each of the following as fractions:
(a) 3.47
(b) 17.001
(c) 0.97
(d) 2.09
(e) 0.009
Ans. (a) 347/100
(b) 17001/1000
(c) 97/100
(d) 209/100
(e) 9/1000

Q.15. Round the following numbers to the nearest ten.
(a) 421
(b) 772
(c) 337
Ans. (a) 420
(b) 770
(c) 340