Class 7 Algebraic Expressions CBSE Questions & Answers

Class 7 · Algebraic Expressions

This is Mathematics Class 7 Algebraic Expressions CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

Find the product of \(\left( {2x + 3y} \right)\left( {2x + 3y} \right)\).

A
\({\text{5}}{{\text{x}}^{\text{2}}} + {\text{ 9}}{{\text{y}}^{\text{2}}} + {\text{ 12xy}}\)
B
\({\text{4}}{{\text{x}}^{\text{2}}} + {\text{ 9}}{{\text{y}}^{\text{2}}} + {\text{ 12xy}}\)
Correct
C
\({\text{4}}{{\text{x}}^{\text{2}}} + {\text{ 7}}{{\text{y}}^{\text{2}}} + {\text{ 12xy}}\)
D
\({\text{4}}{{\text{x}}^{\text{2}}} + {\text{ 9}}{{\text{y}}^{\text{2}}} + {\text{ 13xy}}\)

When terms have the same algebraic factor, they are called __________.

A
expressions
B
None of these
C
like terms
Correct
D
unlike terms

An expression which contains two unlike terms is called _______.

A
None of these
B
monomial
C
trinomial
D
binomial
Correct

A _________ can take various values.

A
term
B
variable
Correct
C
expression
D
None of these

Find the product: \(\left( {\frac{2}{3}xyz} \right)\left( {\frac{3}{4}{x^2}{y^2}{z^2}} \right)\left( {\frac{4}{5}{x^3}{y^3}{z^3}} \right)\).

A
\({{\text{x}}^{\text{6}}}{{\text{y}}^{\text{6}}}{{\text{z}}^{\text{6}}}\)
B
None of these
C
\({\text{6}}{{\text{x}}^{\text{6}}}{{\text{y}}^{\text{6}}}{{\text{z}}^{\text{6}}}\)
D
\(\frac{2}{5}{x^6}{y^6}{z^6}\)
Correct

Simplify these expressions and find their values, if x = 3, a = – 1, b = – 2. 3x – 5a – \({{\text{x}}^{\text{2}}}\) + 9b

A
-13
Correct
B
None of these
C
15
D
13

Simplify these expressions and find their values, if x = 3, a = – 1, b = – 2. 2b – 8x +\({\text{4}}{x^2}\) + 4a

A
4
Correct
B
10
C
None of these
D
6

Simplify combining like terms: 3a – 2b – ab – (a – b + ab) + 3ab + b – a

A
a + b
B
None of these
C
a + ab
Correct
D
a - ab

Simplify combining like terms: \({\text{5}}{x^{\text{2}}}y--{\text{ 5}}{x^{\text{2}}} + {\text{ 3}}y{x^{\text{2}}}--{\text{ 3}}{y^{\text{2}}} + {x^{\text{2}}}--{y^{\text{2}}} + {\text{ 8}}x{y^{\text{2}}}--{\text{ 3}}{y^{\text{2}}}\)

A
\({\text{8}}{x^{\text{2}}}y + {\text{ 8}}x{y^{\text{2}}}--{\text{ 4}}{x^{\text{2}}}--{\text{ 7}}{y^{\text{2}}}\)
Correct
B
None of these
C
\({\text{8}}{x^{\text{2}}}y + {\text{ 8}}x{y^{\text{2}}}--{\text{ 5}}{x^{\text{2}}}--{\text{ 7}}{y^{\text{2}}}\)
D
\({\text{8}}{x^{\text{2}}}y + {\text{ 8}}x{y^{\text{2}}}--{\text{ 4}}{x^{\text{2}}}--{\text{ 9}}{y^{\text{2}}}\)

What should be taken away from \({\text{3}}{x^{\text{2}}}--{\text{ 4}}{y^{\text{2}}} + {\text{ 5}}xy + {\text{ 2}}0\) to obtain\(--{x^{\text{2}}}--{y^{\text{2}}} + {\text{ 6}}xy + {\text{ 2}}0\)?

A
None of these
B
\({\text{4}}{x^{\text{2}}}--{\text{ 3}}{y^{\text{2}}}--{\text{ 7}}xy\)
C
\({\text{4}}{x^{\text{2}}}--{\text{ 5}}{y^{\text{2}}}--xy\)
D
\({\text{4}}{x^{\text{2}}}--{\text{ 3}}{y^{\text{2}}}--xy\)
Correct

The number of terms in the expression 1.2ab – 2.4 b + 3.6a is

A
2
B
4
C
None of these
D
3
Correct

What is the numerical coefficient of \({{\text{y}}^{\text{2}}}\)in the expression \({\text{2}}{{\text{x}}^{\text{2}}}{\text{y }}--{\text{ 15x}}{{\text{y}}^{\text{2}}} + {\text{7y}}\)

A
5
B
x
C
15x
Correct
D
15

The expression x + y – xy is

A
binomial
B
trinomial
Correct
C
monomial
D
None of these

The expression xyz is

A
None of these
B
trinomial
C
binomial
D
monomial
Correct

From the following expressions 10pq, 7p, 8q, \( - {{\text{p}}^{\text{2}}}{{\text{q}}^{\text{2}}}\), -7pq, -23, ab, 3a, b.The like terms are

A
10pq,-7pq
Correct
B
ab, 3a, b
C
None of these
D
7p, 8q