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11. Arrange the following integers in the descending order:

(a) –3, 0, –1, –4, 3, –6 (b) –230, 110, –330, 58, 7 (c) 24, 25, –24, –25, –7
12. Write 5 integers which are

(a) less than –23. (b) greater than –3.
13. Evaluate the value of the following:

(a) |–233| (b) –|–23| (c) 89 – |7|
14. There are two integers missing from the number line. Which missing integer is a positive integer?

–25 –20 ? –10 –5 0 5 10 15 ? 25

15. Which is colder 15°C or 34°C? Locate both the temperatures on this thermometer and mark them
with arrows. °C

0
30
40
10
20
-20
-10
-30
16. Put these temperatures in order from coldest to warmest? 50 60 70 80 90 100
38°C, 70°C, –10°C, 15°C, –6°C, 45°C, 0°C
17. Looking at the geographical cross-section fill in the respective heights:
P: .................
Q: .................
R: .................

S: .................
T: .................

U: .................
V: .................

Addition of Integers

The picture given alongside shows the control panel of a lift of a mall. The spare
ground floor is at ‘0’ and ‘7’ is the top floor. There are two basement floors. SportS

Here −1 indicates one floor down, while −2 indicates two floors down, CiNema
6 7
to the ground floor. On the ground floor, there is a welcome hall and by 4 5 Ice Cream
pressing 4 or (+4) one can reach the bookshop and for sports activity, one BooKS
has to press 6 (+6) button. If someone wants to enjoy playing with toys, 2 3
then obviously on the lift panel −1 has to be pressed. At the ground floor 0 1 Art Centre
indicated by ‘0’, one has to press the positive number button for upward -2 -1 Food Court
movement and the negative button for downward movement. Welcome
hall
The whole movement of the lift works on the expression:

Starting Floor + Movement = Target Floor

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