Page 40 - Mathematics

Solution
13 4 − 13 8+
− + =
10 5 10

5
= −
10
1
= −
2

1
=
2
1
Therefore, the absolute value of − 13 + 4 is .
10 5 2
Tanzania Institute of Education

Example 2.21

Represent the absolute value of 2− on a number line.
Solution

2
−= 2. Thus, the representation of 2 on a number line is shown in the
following number line.

Exercise 2.7

1. Find the absolute value in each of the following:
4
(a) 62 (b) 2 (c) 8− (e) 12.5− (d) − (f) − pq
7
2. Determine the absolute value in each of the following:
4 3 1 10
(a) − (d) −× 11+ 3
3 2
3
Mathematics Form One 3. Evaluate each of the following and arrange the answers in ascending
+
(b) 3.68 3.89−

(e) 0.111 0.889−
3 4
− −
(c) − (f) 0.111 ( 0.01001)−
2 3
order.

−−
−
4, 12 ,−
5, −
9, 37 ,−

34 10 , 12 ,− − 2.

25/10/2024 09:51:11
Mathematics form 1.indd 34 25/10/2024 09:51:11
Mathematics form 1.indd 34