**Fundamental Operations ICSE Class-6th** Concise Selina Mathematics Chapter-19. We provide step by step Solutions of Exercise / lesson-19 **Fundamental Operations** for **ICSE Class-6 **Concise Selina Mathematics. Our Solutions contain all type Questions of Exe-19 A, Exe-19 B, Exe-19 C and Exe-19 D to develop skill and confidence. Visit official Website CISCE for detail information about ICSE Board Class-6 .

**Fundamental Operations ICSE Class-6th** Concise Selina Mathematics Chapter-19

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### Exercise – 19 A **Fundamental Operations ICSE Class-6th** Concise Selina Mathematics

**Question- 1.**

Fill in the blanks :

(i) 5 + 4 = ………… and 5x + 4x = ………….

(ii) 12 + 18 = ………… and 12x^{2}y + 18x^{2}y = ………….

(iii) 7 + 16 = ………….. and 7a + 16b = …………

(iv) 1 + 3 = ………… and x^{2}y + 3xy^{2} = ………..

(v) 7 – 4 = …………… and 7ab – 4ab = …………..

(vi) 12 – 5 = ………… and 12x – 5y = ……………

(vii) 35 – 16 = ………….. and 35ab – 16ba = ………….

(viii) 28 – 13 = …………. and 28ax^{2} – 13a^{2}x = ………….

**Answer**-1

(i) 5 + 4 = **9** and 5x + 4x = **9x**

(ii) 12 + 18 = **30** and 12x^{2}y + 18x^{2}y = **30x ^{2}y**

(iii) 7 + 16 =

**23**and 7a + 16 b =

**7a + 16b**

(iv) 1 + 3 =

**4**and x

^{2}y + 3xy

^{2}=

**x**

^{2}y + 3xy^{2}(v) 7 – 4 =

**3**and 7ab – 4ab =

**3ab**

(vi) 12 – 5 =

**7**and 12x – 5y =

**12x – 5y**

(vii) 35 – 16 =

**19**and 35ab – 16ba =

**19ab**

(viii) 28 – 13 =

**15**and 28ax

^{2}– 13a

^{2}x =

**28ax**

^{2}– 13a^{2}x**Question- 2.**

Fill in the blanks :

(i) The sum of – 2 and – 5 = …………. and the sum of – 2x and – 5x = …………….

(ii) The sum of 8 and – 3 = ………….. and the sum of 8ab and – 3ab = ………….

(iv) 15 + 8 + 3 = ……….. and 15x + 8y + 3x = …………….

(v) 12 – 9 + 15 = …………… and 12ab – 9ab + 15ba = ……………..

(vi) 25 – 7 – 9 = and 25xy – 7xy – 9yx = ……………

(vii) – 4 – 6 – 5 = …………. and – 4ax – 6ax – 5ay = …………….

**Answer-2**

(i) The sum of – 2 and – 5 = **– 7** and the sum of – 2x and – 5x =** -7x**

(ii) The sum of 8 and -3 = **5** and the sum of 8ab and – 3ab = **5ab**

(iii) The sum of – 15 and – 4 = **– 19** and the sum of – 15x and – 4y = **– 15x – 4y**

(iv) 15 + 8 + 3 = **26** and 15x + 8y + 3x = **18x + 8y**

(v) 12 – 9 + 15 = **18** and 12ab – 9ab + 15ba = **18ab**

(vi) 25 – 7 – 9 = **9** and 25xy – 7xy – 9yx = **9xy**

(vii) – 4 – 6 – 5 = **– 15** and – 4ax – 6ax – 5ay = **– 10ax – 5ay**

**Question -3.**

Add:

(i) 8xy and 3xy

(ii) 2xyz, xyz and 6xyz

(iii) 2a, 3a and 4b

(iv) 3x and 2y

(v) 5m, 3n and 4p

(vi) 6a, 3a and 9ab

(vii) 3p, 4q and 9q

(viii) 5ab, 4ba and 6b

(ix) 50pq, 30pq and 10pr

(x) – 2y, – y and – 3y

(xi) – 3b and – b

(xii) 5b, – 4b and – 10b

(xiii) – 2c, – c and – 5c

**Answer-3**

(i) 8xy + 3xy = 11xy

(ii) 2xyz + xyz + 6xyz = (2 + 1 + 6) xyz = 9xyz

**Question -4.**

Evaluate :

**Answer-4**

(i) 6a – a – 5a – 2a = 6a – (1 + 5 + 2).a

= 6a – 8a = -2a

**Question -5.**

Evaluate :

**Answer-5**

**Question -6.**

Subtract the first term from the second :

**Answer**–**6**

**Question -7.**

Simplify :

**Answer-7**

### Selina Solutions of Exercise – 19 B **Fundamental Operations for ICSE Class-6th** Concise Mathematics

**Question-1**

Find the sum of :

**Answer-1**

**Question- 2.**

Add the following expressions :

**Answer-2**

**Question- 3.**

Evaluate :

**Answer-3**

**Question -4.**

Subtract :

**Answer-4**

**Question -5.**

**Answer-5**

**Question- 6.**

From the sum of x + y – 2z and 2x – y + z subtract x + y + z.

**Answer-6**

**Question -7.**

From the sum of 3a – 2b + 4c and 3b – 2c subtract a – b – c.

**Answer-7**:

**Question -8.**

Subtract x – 2y – z from the sum of 3x – y + z and x + y – 3z.

**Answer-8**:

(3x – y + z) + (x + y – 3 z) – (x – 2y – z)

= 3x – y + z + x + y – 3z – x + 2y + z

= 3x + x – x – y + y + 2y + z + z – 3z

= 3x + 2y – z

**Question -9.**

Subtract the sum of x + y and x – z from the sum of x – 2z and x + y + z

**Answer-9**

**Question- 10.**

By how much should x + 2y – 3z be increased to get 3x ?

**Answer-10**:

3x – (x + 2y – 3z)

= 3x – x – 2y + 3z

= 2x – 2y + 3z

**Question- 11.**

The sum of two expressions is 5x^{2} – 3y^{2}. If one of them is 3x^{2} + 4xy – y^{2}, find the other.

**Answer-11**:

**Question -12.**

The sum of two expressions is 3a^{2} + 2ab – b^{2}. If one of them is 2a^{2} + 3b^{2}, find the other.

**Answer-12**:

**Concise Maths Selina solutions of Exe-19 C Fundamental Operations for ICSE Class-6th**

**Question- 1.**

Fill in the blanks :

**Answer-1**:

(i) 6 x 3 = 18 and 6x x 3x = 18x^{2}

**Question- 2.**

Fill in the blanks :

**Answer-2**:

**Question- 3.**

#### Find the value of :

**Answer-3**:

**Question -4.**

Multiply :

**Answer-4**:

**Question- 5.**

Multiply :

**Answer-5**:

**Question -6.**

Multiply :

**Answer-6**:

**Question- 7.**

Multiply :

(i) x + 2 and x + 10

(ii) x + 5 and x – 3

(iii) x – 5 and x + 3

(iv) x – 5 and x – 3

(v) 2x+ y and x+ 3y

(vi) (3x – 5y) and (x + 6y)

(vii) (x + 9y) and (x – 5y)

(viii) (2x + 5y) and (2x + 5y)

**Answer-7**:

**Question -8.**

Multiply :

**Answer-8**:

**Question -9.**

Find the product of :

**Answer-9**:

### Exercise – 19 D **Fundamental Operations ICSE Class-6th** Concise Selina Mathematics

**Question-1**

Divide :

**Answer-1**:

**Question -2.**

Simplify :

**Answer-2**:

**Question- 3.**

#### Divide :

**Answer-3**:

**Question- 4.**

Simplify :

**Answer-4**:

**Question -5.**

#### Divide :

**Answer-5**

— End of **Fundamental Operations** ICSE Class-6th Solutions :–

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