This worksheet will deal with rounding off number to 10, 100, 1000, rounding large numbers, decimal fractions, and correct to one and two decimal place. Hence it will provide students a comprehensive practice on rounding off number.
1. Round off the following numbers to nearest 10:
(a) 25
(b) 88
(c) 142
(d) 158
(e) 4736
Solution:
(a) 30
(b) 90
(c) 140
(d) 160
(e) 4740
2. Round off the following numbers to nearest 100:
(a) 787
(b) 969
(c) 1235
(d) 4889
(e) 89356
Solution:
(a) 800
(b) 1000
(c) 1200
(d) 4900
(e) 89400
3. Round off the following numbers to nearest 1000:
(a) 5697
(b) 7633
(c) 21453
(d) 75864
(e) 12463
Solution:
(a) 6000
(b) 8000
(c) 21000
(d) 76000
(e) 12000
4. Round off the following numbers to nearest 10000:
(a) 45676
(b) 23536
(c) 715896
(d) 986352
(e) 142362
Solution:
(a) 50000
(b) 20000
(c) 720000
(d) 990000
(e) 140000
5. Round off the following numbers to nearest 10 and 100:
(a) 986
(b) 576
(c) 5263
(d) 7459
(e) 9635
Solution:
(a) Nearest 10: 990
Nearest 100: 1000
(b) Nearest 10: 580
Nearest 100: 600
(c) Nearest 10: 5260
Nearest 100: 5200
(d) Nearest 10: 7460
Nearest 100:7500
(e) Nearest 10: 9640
Nearest 100: 9600
6. Round off the following decimal numbers to the nearest units place:
(a) 96.12
(b) 23.65
(c) 64.58
(d) 423.97
(e) 769.58
Solution:
(a) 96
(b) 24
(c) 65
(d) 424
(e) 770
7. Correct the following numbers to one decimal place:
a) 54.362
b) 123.569
c) 236.547
d) 9685.2365
e) 7870.2136
Solution:
(a) 54.400
(b) 123.600
(c) 236.500
(d) 9685.2000
(e) 7870.2000
8. Correct the following numbers to two decimal place:
(a) 86.412
(b) 75.963
(c) 789.632
(d) 752.145
(e) 990.868
Solution:
(a) 86.410
(b) 75.960
(c) 789.630
(d) 752.150
(e) 990.870
9. Round off the following numbers to nearest hundred thousand:
(a) 234,631
(b) 452,956
(c) 1,287,653
(d) 7,596,423
(e) 456,370
Solution:
(a) 200,000
(b) 500,000
(c) 1,300,000
(d) 7,600,000
(e) 500,000
10. Round off the following numbers to nearest million:
(a) 4,056,387
(b) 6,382,012
(c) 70,321,056
(d) 5,310,478
(e) 2,037,598
Solution:
(a) 4,000,000
(b) 6,000,000
(c) 70,000,000
(d) 5,000,000
(e) 2,000,000
11. Round off the following numbers to nearest ten million:
(a) 45,637,890
(b) 75,395,184
(c) 30,256,987
(d) 88,427,589
(e) 450,088,621
Solution:
(a) 50,000,000
(b) 80,000,000
(c) 30,000,000
(d) 90,000,000
(e) 450,000,000
12. Divide 58.98 by 7 and correct to one and two decimal places
Solution:
One decimal place = 8.4
Two decimal place = 8.43
13. Divide 500 by 3 and correct to nearest ones, one decimal place and two decimal places
Solution:
Nearest ones = 167
One decimal place = 166.7
Two decimal place =166..67
14. Multiply 8695 by 35 and round off to nearest tens, 100, 1000 and 10000.
Solution:
Nearest 10 = 304330
Nearest 100 = 304300
Nearest 1000 = 304000
Nearest 10000 = 300000
15. Multiply 7596 by 89 and round it off to nearest tens, 100, 1000, 10000 and 100000
Solution:
Nearest 10 = 676040
Nearest 100 = 676000
Nearest 1000 = 676000
Nearest 10000 = 680000
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