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\\November 3, 2023 11:23 AM Surender Prajapati Proof 2 Reader _________________________ Date: ___________________74

Chapter assessment
1. Choose the correct option.

(a) The predecessor of 0 is

(i) –2 (ii) 1 (iii) –1 (iv) 0 itself
(b) How many integers lie between –2 and 2?
(i) 5 (ii) 3 (iii) 4 (iv) 0

(c) Which of the following comparisons is true?
(i) –12 > 12 (ii) –12 < 0 (iii) –21 > –12 (iv) 1 < 0

2. Write the opposites of the following:
(a) descend in height by 200 m (b) deposit `500 in post office

(c) profit of `350 (d) 25°C below the freezing point
3. Represent the following statements mathematically using the sense of oppositeness.

(a) depth of 200 m at the sea level (b) withdrawal `2000

(c) profit of `5570 (d) 12°C above freezing point (0°C)
(e) 150 m due south (f) move 9 steps upstairs

4. Represent the following on the number line.

(a) 5 more than –3 (b) 7 less than –4 (c) 12 more than –3
5. Write all the integers between the given pairs (write them in the increasing order.)

(a) –1 and 9 (b) –15 and –11
6. (a) Write 3 negative integers greater than –67. (b) Write 3 integers less than –49.
7. Evaluate the following.

(a) –14 – (–13) (b) 25 – 10 + (–15) (c) –104 + 214

8. If the sum of two integers is –200 and one of the integers be 169, then find the other.
9. The temperature of Solan was –7°C at the morning and 6 hours later, it was 12°C.
What was the change in temperature?

Mental Maths
Write yes or no for the following statements.

1. –12 is to the right of –10 on a number line. __________
2. –10 is to the right of 1 on a number line. __________

3. Smallest integer is – 1. __________
4. The number increases as we move to the right. __________

5. Every positive integer is smaller than every negative integer. __________

134 Mathematics-5