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**Q.1. Write 'True' or 'False' for the following :(i) –20° C represent temperature "above 20°C"(ii) 8 > (–10)(iii) | – 2 | = 2(iv) | – 4 – 2 | = – 6 (v) (–3) > (–5) **

**Ans.**

(i) False

(ii) True

(iii) True

(iv) False

(v) True

**Q.2. Fill up the blanks :****(i) Integer which is neither positive nor negative is ____________****(ii) Predecessor of (–99) is ____________****(iii) | -26-14 | = ____________****(iv) Successor of (–100) is ____________****(v) Largest 3-digit negative integer is ____________ **

**Ans.**

(i) 0

(ii) –100

(iii) 40

(iv) –99

(v) –100

**Q.3. Subtract (–25) from the sum of 15 and 35.Ans. **75

**Q.4. Add the sum of (–2063) and 562 to (–2063).Ans. **–3564

**Q.5. Simplify :****(i) (–50) + (–200) – (–500)(ii) 23 – (–15) + 12(iii) (24 + 6) ÷ (–3)(iv) 19 + {10 ÷ (7 – 9)}(v) 12 – {16 – (6 + 2 – 6 ÷ 3)} **

**Ans.**

(i) 250

(ii) 50

(iii) (–10)

(iv) 14

(v) 2

**Q.6. Write additive inverse of :(i) (–6347)(ii) 0(iii) 4231(iv) 2132 – 132(v) –10 – 5**

**Ans.**

(i) 6347

(ii) 0

(iii) –4231

(iv) –2000

(v) 15

**Q.7.**

**Observe the number line given above and answer the following :(i) What is the position of Reeta on the number line?(ii) What is the position of Seema?(iii) What is the distance between Reeta and Seema?**

**Ans.**

(i) Position of Reeta = –3

(ii) Position of Seema = 5

(iii) Distance between them = 8 units

**Q.8. Represent the following numbers/expressions on a number line?(i) –7(ii) + 9(iii) 7 – 2(iv) – 5–4(v) 4 – 9 **

**Ans. **

(i)

(ii)

(iii)

(iv)

(v)

**Q.9. Enter the correct sysmbol >, =, < in the following :(i) (–7) _________ (2)(ii) 7 _________ (–12)(iii) 0 _________ (–2)(iv) (–16) _________ (9 + 7)(v) – (10 + 5) _________ (–15) **

**Ans.**

(i) <

(ii) >

(iii) >

(iv) <

(v) =

**Q.10. Find the values of 'a' when :(i) a + 10 = – 18(ii) a – 3 = 7(iii) –13a = 91(iv) a ÷ 5 = 3**

**Ans.**

(i) –28

(ii) 10

(iii) –7

(iv) 15

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