Page 54 - Mathematics

Exercise 3.2

1. Round off the following numbers correct to the given number of decimal
places.
(a) 4000.001 (2 decimal places) (d) 25.35447 (4 decimal places)
(b) 19.86 (1 decimal place) (e) 0.01001 (4 decimal places)
(c) 0.0075 (3 decimal places) (f) 10.0100165 (3 decimal places)
2. Find the value of each of the following correct to 2 decimal places.

(a) 3.142 15.25 15× ×
(b) 7.9909 0.011×
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(c) 0.0073 0.73×
3. Write each of the following numbers correct to 2 decimal places.
(a) 0.0817 (d) 0.7153 (g) 3.6149
(b) 5.0744 (e) 12.047 (h) 0.00825
(c) 1.70007 (f) 3.3456 (i) 72.7946
4. Convert each of the following fractions into decimals correct to 3 decimal
places.
10 4 2 4 11 11
(a) (b) (c) (d) (e) (f) 2
7 9 3 11 7 29

5. Write each of the following numbers correct to 1 decimal place.
(a) 3.142 (d) 0.09178
(b) 0.6667 (e) 0.7159
(c) 250.707 (f) 10.445
6. Write each of the following numbers correct to 3 decimal places.
(a) 0.7526 (d) 8.4999
(b) 34.7007 (e) 5.5555
(c) 3.14159 (f) 2.66732
7. Divide 8.51 by 0.472, then give the answer correct to 2 decimal places.
8. Multiply 9.0017 by 0.0987, then give the answer correct to 2 decimal
places.
Mathematics Form One (a) 0.002752 (4 decimal places) (d) 6.0097 (3 decimal places)
9. Round off the following numbers correct to the given number of decimal
places.

(b) 20.04416 (2 decimal places)
(e) 2.14678 (1 decimal place)
(c) 0.17244 (3 decimal places)

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Mathematics form 1.indd 48 25/10/2024 09:51:14
Mathematics form 1.indd 48