S.chand class 6 Mathematics Chapter 14 Exercise 14D

 Exercise 14D

Question 1

Simplify:

1. $6 a-(5 a-2 x)$

2. $5 x+(3 x-7)$

3. $5 x+(-7 x-2 y)$

4. $3 y-(3 y+2)-6+(3 y-8)$

5. $4 x-[x-(4 x+3 y)+5 y]$

6. $-\{-2 b-(3 b+7 c)\}$

7. $4 x^{2}-\left[3 y^{2}-\left\{5 x^{2}-2 y^{2}-\left(x^{2}-y^{2}\right)\right\}\right]$

8. $2 a-3 b-[4 a-3 b-\{a-2 c-(a-2 b-c)\}$

Multiple Choice Question (MCQ)

Tick (✔) the correct option.

9. $-x-[x+\{x+y-2 x-(x-2 y)\}-y]$ on simplification is equal to

(a) $-2 x$

(b) $-4 x+y$

(c) $4 x-2 y$

(d) $-2 y$