Unit 1: Real And Complex Numbers - Mathematics For Class IX (Science Group) - Solved Exercise 1.2 - By Miss Aira Shakir

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Unit 1: Real And Complex Numbers
Exercise 1.2

By Miss Aira Shakir
1. Recognize the properties of real numbers used in the following:

2. Fill the correct real number in the following to make the real numbers property correct.

3. Fill in the blanks to make the property correct/true.
(i) 5 < 8 and 8 < 10 ⇒ 5 < 10
(ii) 10 > 8 and 8 > 5 ⇒ 10 > 5 (OR 5 < 10)
(iii) 3 < 6 ⇒ 3 + 9 < 6 + 9
(iv) 4 < 6 ⇒ 4 + 8 < 6 + 8
(v) 8 > 6 ⇒ 6 + 8 > 6 + 6

4. Fill the following blanks which make property correct/true:
(i) 5 < 7 ⇒ 5 x 12 < 7 x 12
(ii) 7 > 5 ⇒ 7 x 12 > 5 x 12
(iii) 6 > 4 ⇒ 6 x (-7)  < x 4 x (-7)
(iv) 2 < 8 ⇒ 2 x (-4)  > 8 x (-4)

5. Find the additive and multiplicative inverse of the following real numbers.