Page 43 - ICSE Math 6

Example 4: The adjacent figure is a vertical number line representing
integers. Answer the following. D
(a) If point A is +2, then which point is –2? C
(b) Is point F a negative integer or a positive integer?
(c) Write integers for B and G.

(d) Which point marked on this number line has the least value? B +2
A
(e) Arrange all the points in ascending order of their values. O 0
(f) Which integer is opposite to D?
Solution: (a) Point E is –2. E
(b) Negative integer F
(c) B = +3, G = –6 G
(d) H = –9 has the least value.

(e) H < G < F < E < O < A < B < C < D H
(f) The integer opposite to D is H.
Example 5: Following is the list of temperatures of five places in India on a particular day of the
year.
Place Temperature
Siachin 10°C below 0°C ________

Shimla 2°C below 0°C ________
Ahmedabad 30°C above 0°C ________
Delhi 20°C above 0°C ________
Srinagar 5°C below 0°C ________
(a) Write the temperatures of these places in the form of integers in the blank column.
(b) Following is the number line representing the temperature in degree Celsius. Plot
the name of the city against its temperature.

–25 –20 –15 –10 –5 0 5 10 15 20 25 30 35 40

(c) Which is the coldest place?
(d) Write the names of the places where the temperature is above 10°C.
Solution: (a) Place Temperature
Siachin 10°C below 0°C –10°C

Shimla 2°C below 0°C –2°C
Ahmedabad 30°C above 0°C +30°C
Delhi 20°C above 0°C +20°C
Srinagar 5°C below 0°C –5°C
Srinagar
Siachin Shimla Delhi Ahmedabad
(b)

–25 –20 –15 –10 –5 0 5 10 15 20 25 30 35 40
(c) Siachin is the coldest place.
(d) Delhi and Ahmedabad

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