Page 116 - ICSE Math 5

Exercise 8.1

1. Write the opposites of the following.

(a) Withdrawal of ` 5,000 (b) 750 km west of Haryana

(c) At a height of 30 m (d) 250 m below the sea level
(e) Temperature above 25°C (f) Loss of ` 10,000

2. Represent the following as integers by using appropriate signs.

(a) 25°C below 0°C (b) A kite flying at the height of 100 m
(c) A profit of ` 800 (d) Rise in temperature of 10°C

(e) 30 m below the ground level (f) Deposit of ` 4,585

3. Represent the following integers on a number line.

(a) –6 (b) –10 (c) +2 (d) +7

4. Look at the given number line representing integers and locate the integers corresponding
to the following points: A, B, C, D, E, F, G and H on it.

D E C A F B G H

–10 0 10

Now answer the following questions.
(a) Which of the given points represent positive integers?

(b) Which of the given points represent negative integers?

(c) Which points represent the greatest value and the smallest value?

5. Draw a number line and use it to write the predecessor and successor of the following
integers.

(a) 1 (b) –5 (c) –8 (d) 7 (e) 0

6. Write True or False for the following statements. Also, correct the false statements.

(a) On a number line, –2 is to the left of –1.

(b) –15 is greater than –14.

(c) 15°C below 0°C can be written as –15°C.
(d) 0 is not an integer.

(e) All negative integers are smaller than the positive integers.

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