CBSE Questions for Class 7 Maths Algebraic Expressions Quiz 1 - MCQExams.com

State True or False:
Addition of $$ 5a+3b, \ a-2b, \ 3a+5b $$ is $$9a+6b$$.
  • True
  • False
State True or False:
$$ b^2y-9b^2y+2b^2y-5b^2y $$ is equal to $$-11b^2y $$.
  • True
  • False
State True or False:
$$ -7x^2+18x^2+3x^2-5x^2 $$ is equal to $$9x^2 $$
  • True
  • False
$$\displaystyle 4x-\left( -2y+5x \right) $$ is equal to
  • $$\displaystyle 9x-2y$$
  • $$\displaystyle 9x+2y$$
  • $$\displaystyle x+2y$$
  • $$\displaystyle -x+2y$$
On subtracting 7x+5y-3 from 5y-3x-9 we get
  • 10x +6
  • -10x-6
  • 10x+10y-12
  • -10x-12
The number of terms is $$\displaystyle 6x^{3}+5x^{2}-2x+3$$
  • $$2$$
  • $$3$$
  • $$4$$
  • $$5$$
What must be subtracted from $$3x^{2}+4y^{2}-5$$ to get $$2x^{2}-3y^{2}+5$$?
  • $$x^{2}+3y^{2}+5$$
  • $$x^2 - 4y^2 + 5$$
  • $$x^2 + 7y^2 - 10$$
  • $$x^2 - 7y^2 - 10$$
State true or false.
After Subtracting $$(1 + x + 2x^{2} - 3x^{3})$$ from $$(2x^{2} -4x^{3} +4x + 9)$$ we get $$(-x^{3} + 3x +8)$$.
  • True
  • False
Evaluate : $$ 7x-9y+3-3x-5y+8 $$
  • $$4x+4y+11 $$
  • $$4x-14y+11 $$
  • Cannot be determined
  • None of these
State True or False:
Addition of $$ a-3b+3, \ 2a+5-3c, \ 6c-15+6b $$ is $$3a+3b+3c-7$$.
  • True
  • False
Subtract $$4p^2q -  3pq + 5pq^2 - 8p - 7q - 10$$ from $$18 - 3p +  11q + 5pq - 2pq^2 + 5p^2q$$
  • $$pq^2 - 7p^2q + 8pq + 18q + 5p + 28$$
  • $$p^2q - 7pq^2 + 8pq + 18p + 5q + 28$$
  • $$pq^2 - 7p^2q + 8pq + 18p + 5q + 28$$
  • $$p^2q - 7pq^2 + 8pq + 18q + 5p + 28$$
Simplify: $$-7p-4(-3p + 2 ) $$
  • $$-19p + 8$$
  • $$5p + 8$$
  • $$-19p - 8$$
  • $$5p - 8$$
Simplify :$$(-8pst + 3prq -14) - (7prq - 20 + 2pst) = $$
  • $$6-10pst + 10prq$$
  • $$6 - 10pst - 4prq$$
  • $$-6pst -10prq + 6$$
  • $$-10pst-4prq-34$$
Add the following polynomials
$$ 4 + 2y - 3y^{3}, -8 + 4y +7y^{3} $$ $$ and\  5\ - 6y + 8y^{3} - 6y^{2} $$
  • $$12y^{3} - 6y^{2} + 1$$
  • $$12y^{3} +6y^{2} + 1$$
  • $$12y^{3} - 6y^{2} - 1$$
  • $$12y^{3} + 6y^{2} - 1$$
 If $$P = 3x -4y -8z, Q = -10y + 7x + 11z$$ and $$R = 19z - 6y + 4x$$, then $$P-Q + R$$ is equal to
  • $$13x -20y + 16z$$
  • 0
  • $$x + y + z$$
  • $$2x - by + 3z$$
$$(4px^{2}+5q^{2}y -9rz) - (-3q^{2}y + 7px^{2}-rz) = $$
  • $$11px^{2} + 9q^{2}y - 10rz$$
  • $$-3px^{2} + qy - 8rz$$
  • $$-3px^{2} + 8q^{2}y - 8rz$$
  • $$-11px^{2}-8q^{2}y-10rz$$
Simplify :$$(-3pq^{2}+ 4pq) - (7pq - 9pq^{2}).$$
  • $$6pq^{2} + 3pq$$
  • $$6pq^{2} - 3pq$$
  • $$-12pq^{2} + 3pq$$
  • $$-12pq^{2}-3pq$$
Subtract $$4x+y+2$$ from the sum of  $$3x-2y+7$$ and $$5x-3y-8$$.
  • $$4xy+6y-3$$
  • $$6x-y+2$$
  • $$x-2y-3$$
  • $$4x-6y-3$$
State whether the following statement is true or false.
After Subtracting $$-x^{4} + 4x^{3} y - 8x^{2} y^{2} + 2 xy^{3} - 4y^{4}$$ from $$ -5x^{3}y + x^{2}y^{2} - 6y^{4}$$ we get,$$ x^{4} - 9x^{3}y + 9x^{2} y^{2} - 2xy^{3} -2y^{4}$$
  • True
  • False
Which polynomial should be subtracted from $$y^3+2y^2+5y-1$$ to get $$2y^2+12$$?
  • $$y^3+5y-13$$
  • $$y^3+y-1$$
  • $$5y-3$$
  • $$y^3-y-14$$
Add the following expressions $$2a+b+7$$ and $$4a+2b+3$$.
  • $$6a+2b+5$$
  • $$3b-6a+5$$
  • $$6ab+3b-10$$
  • $$6a+3b+10$$
What must be subtracted from $$ x^{4} + 4x^{2} -3x + 7$$ to get $$3x^{3} - x^{2} + 2x + 1$$?
Answer: $$x^{4}-3x^{3}+5x^{2} - 5x +6$$
  • True
  • False
Which polynomial should be added to $$2x^4-3x^2+5x+8$$ to get $$2x^2-5x+4$$?
  • $$x^3+5x^2-x$$
  • $$2x^5+x^2-10x-9$$
  • $$-2x^4+5x^2-1$$
  • $$-2x^4+5x^2-10x-4$$
Simplify :
$$(3x^2-2x+1)+(x^2+5x-3)+(4x^2+8)$$
  • $$8x^2+3x+6$$
  • $$x^2+x$$
  • $$x^2+x_6$$
  • $$8x^2+x+9$$
Subtract the second polynomial from the first :

$$x^4+x^2+x-1\, ; \, x^4-x^3-x^2+1$$
  • $$2x^2+x-2$$
  • $$x^3+2x^2+x-2$$
  • $$x^3+2x^2+x-2$$
  • $$x+2x^2-2$$
State True or False:
Addition of $$ 8x-3y+7z, \  -4x+5y-4z, \ -x-y-2z $$ is $$3x + y+z $$.
  • True
  • False
State True or False:
$$ abx-15abx-10abx+32abx $$ is equal to $$8abx $$.
  • True
  • False
State True or False:
$$ 3x^2+5xy-4y^2+x^2-8xy-5y^2 $$ is equal to $$4x^2-3xy-9y^2 $$.
  • True
  • False
State True or False:
Addition of $$ 3b- 7c+10, \ 5c-2b-15, \ 15+12c+b $$ is $$2b+10c+10 $$.
  • True
  • False
State True or False:
Total savings of a boy who saves Rs.$$(4x-6y) $$, Rs.$$(6x+2y)$$, Rs.$$(4y-x)$$ and Rs.$$(y-2x)$$ for four consecutive weeks is Rs.$$(7x+y)$$.
  • True
  • False
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