Addition and Subtraction of Algebraic Expressions

Q. If $x+y=5,y+z=7$ and $z+x=12$, what is the value of $x+y+z$?

1. 2
2. 12
3. 5
4. 24

Q. Question 4

The sum of -7pq and 2pq is
a) -9pq
b) 9pq
c) 5pq
d) -5pq

Q. What is the result when from the sum of 7x - 2y - 3z and 3x + 5y -8z, take away x - 3z?

1. 9x - 3y + 8z
2. 9x + 3y - 8z
3. 9x - 3y - 8z
4. 9x + 3y + 8z

Q. Which of the following expression represents, take away 3 times of x from z .

1. z - 3x
2. (3 + x) - z
3. 3x - z
4. z - 3 - x

Q.

What is the sum of $x^3+4xy+3y^2$ and $3x^2+5xy$ ?

1. $x^3+4xy+3y^2{x}^2+5xy$

2. $x^3+9xy+3y^2+3x^2$

3. $3x^3+9xy+3y^2$

4. None of the above

Q. The expression obtained when y is multiplied by 6 and then subtracted from 4 is ?

1. $4y-6$
2. $4y+6$
3. $4-6y$
4. $6y-4$

Q. If the perimeter of a square is 80 cm, find the length of its sides.

Q.

If $A=5x-2y+4$, $B=-4x+6y-1$ and $C=11y-10$, find $A+B-C$.

Q. Solve the linear equation:

1. $t=-2$
2. $t=1$
3. $t=6$
4. $t=-9$

Q. Find the side of the square whose perimeter is:

(i) 16 m
(ii) 40 cm
(iii) 22 cm

Q.

Give expression for the following statements:

$a$ increased by twice of $b$

Q. Find the perimeter of a triangle whose sides are 6 cm, 9 cm and 5 cm.

Q.

The sum of expressions $3x+4y$ and $2y+7x$ is

1. $11x+5y$

2. $5x+11y$

3. $10x+6y$

4. $6x+10y$

Q. Add.
(1) 8 + 6
(2) 9 + ( –3)
(3) 5 + ( –6)
(4) –7 + 2
(5) –8 + 0
(6) –5 + ( –2)

Q.

Subtract the sum of $x^2+2x+2$ and $x^{2}y+3$ from the sum of $2x^2+5x-1$ and $y^2+x^{2}y-3$.

Q.

Add.$5a-7b,3b-4a+2,2a-3ab-5$

Q. Each symbol is given below represents an algebraic expression written in it:

Find the value of the following.

1. 
2. 
3. 
4. 

Q.

Three sides of a triangle are of lengths 12.4 centimetres, 8.3 centimetres and 15.9 centimetres. Find the perimeter.

Q.

What must be added to $xy+3x-2y$ to get $7x+5y$?

1. 4x + 7y + xy

2. 4x - 7y - xy

3. 4x + 7y - xy

4. 4x - 7y + xy

Q.

Add the following :

$2x,7x,-3x$

Q. Find the answer to the following expression: 15 - { (9/3) x (2+1) } + 6

1. 13
2. 12
3. 14
4. 16

Q. The perimeter of a triangle is 55 cm. One its sides is 15 cm. If the other two sides are equal, find their length.

Q.

From the sum of $a+b-3c$and $b+c-a$ subtract the sum of $3c-8b+2a$and $-2c+5a-2b$

Q. Evaluate the expression: [2 x (-6)] / [(-4) x 3]

1. 1
2. 2
3. -2
4. -1

Q. Find the perimeter of a square whose side is 12 cm.

Q. What has to be added to $(2a+3b)$ to get $(7a+9b)$?

Q.

Two sides of a triangle are $15cm$ and $20cm.$ The perimeter of the triangle is $50cm.$ What is the third side?

Q. Match the following algebric equations

1. 3xz+2zx
2. 3xy+2zy
3. 2xy+3xz+2yz
4. 5a+x+y+2z

Q. Each symbol given below represents an algebraic expression written in it:

Find the value of
.

1. 
2. 
3. 
4. 

Q. If x=1 , z=2 then,
$x^2+3xz+2x^2+xz=$

1. 11
2. 10
3. 6