Question

Exercise 1.2
1. Identify the property demonstrated
(a) (-7)+0=-7
(b) (-9) + 9 = 0
Fro
(c) [6+(-3)] + (-9) = 6 + [(-3) + (-9)]
(d) (-11) + 5 = 5 + (-11)
2. Write down a pair of integers whose:
We
(a) sum is -7.
(b) difference is 10.
(c) sum is 0.
3. Write a pair of integers whose sum gives
(open ended) Sir
(a) a negative integer
(b) an integer smaller than both the integers.
(c) an integer greater than both the integers. (d) an integer smaller than only one of the integers.​

Answer 1

Answer:

thanks

Explanation:

Using appropriate properties, find:

(i) -2/3 * 3/5 + 5/2 – 3/5 * 1/6 (ii) 2/5 * (3/-7) – 1/6 * 3/2 + 1/14 * 2/5

Answer:

(i) -2/3 * 3/5 + 5/2 – 3/5 * 1/6

= -2/3 * 3/5 – 3/5 * 1/6 + 5/2 [Using associative property]

= 3/5 * (-2/3 – 1/6) + 5/2 [Using distributive property]

= 3/5 * {(-4 - 1)/6} + 5/2 [LCM (3, 2) = 6]

= 3/5 * (-5/6) + 5/2

= -3/6 + 5/2

= -1/2 + 5/2

= (-1 + 5)/2

= 4/2

= 2

(ii) 2/5 * (3/-7) – 1/6 * 3/2 + 1/14 * 2/5

= 2/5 * (-3/7) + 1/14 * 2/5 – 1/6 * 3/2 [Using associative property]

= 2/5 * (-3/7 + 1/14) – 1/2 * 1/2 [Using distributive property]

= 2/5 * {(-6 + 1)/14} – 1/4 [LCM (7, 14) = 14]

= 2/5 * (-5/14) – 1/4

= -1/7 – 1/4

= (-4 -7)/28 [LCM (7, 4) = 28]

= -11/28

Answer 2

Explanation:

SuryanshYadav........

Explanation........

1. I don't know......
2. Again I don't know..