Page 58 - Mathematics

2. Approximate each of the following numbers correct to the required
number of significant figures.
(a) 0.285173 (3 significant figures)
(b) 88092.7 (4 significant figures)

(c) 2.007138 (3 significant figures)
(d) 74.471 (1 significant figure)
(e) 10.6987 (3 significant figures)
(f) 126. 306 (2 significant figures)
3. Write each of the following fractions in decimals according to the given
instruction:
Tanzania Institute of Education
25
(a) correct to 4 significant figures.
13
5
(b) correct to 3 significant figures.
7
4. Find the sum of the following numbers, and give your answers correct

to 3 significant figures.
(a) 8917, 201392, 500099, 1983
(b) 0.5021, 21.1108, 0.00472, 3.079
(c) 98.528, 8.888, 0.337, 24.82

(d) 0.07637, 72.0976, 4.7135, 25.4556
5. Find the value of each of the following expressions. Write your answers
correct to the given number of significant figures.
(a) 0.83 0.737× (3 significant figures)
(b) 5.178 20× (2 significant figures)
(c) 7.351 4 .83× (4 significant figures)

(d) 7.31 0.983÷ (3 significant figures)
(e) 149.001 8.99÷ (3 significant figures)
(4 significant figures)
(f) 6.814 72.35× 22 in decimals correct to 4 significant figures.
Mathematics Form One (b) Find the value of the following expression in decimal, correct to 2
6. (a) Write
3

1
1
4.
3 +
significant figures, +
3
2
(c) Write the number 0.48965 correct to 4 significant figures.

52

25/10/2024 09:51:15
Mathematics form 1.indd 52
Mathematics form 1.indd 52 25/10/2024 09:51:15