Practice questions for Algebraic Expressions and Identities Class 8 Maths Chapter 9

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Question 1
 Identify the terms, their coefficients for each of the following expressions.
(i) xyz2 + 3xy
 (ii) 1 - x -2 x2
(iii) 4p2q2 – 4p2q2r2 + r2
 (iv) 4 – xy + yz – xz
 (v) (x/4) –(y/5) -y
 (vi) 1.3a – 2.6ab + 1.5b
Question 2
 Classify the following polynomials as monomials, binomials, trinomials. Which polynomials do not fit in any of these three categories?
x2 + y2
x + x2 + x3 + x4 + x5
8 - y +-5x
2y – 3y2
2y – 3y + 4y3
5x – 8y + 3xy
4 – 15z2
ab + bc + cd + da+ 2ab
p2q + pq2
2p + 2q+1
Question 3
 Add the following.
(i) ab – bc+ ac, bc – ca+ ab, ca – ab-2bc
 (ii) p – q + pq, q – r + qr, r – p + pr , p+q+r
 (iii) 2p2q2 – 3pq + 4, 5 + 7pq – 3p2q2 ,4p2q2 + 10pq
 (iv) a2 + b2, b2 + c2, c2 + a2, 2ab + 2bc + 2ac
Question 4.
(a) Subtract 8a – 7ab + 3b - 20 from 20a – 9ab + 5b – 20
 (b) Subtract 3pq + 5qr – 7pr+1 from -4pq +2qr – 2pr + 5pqr+1
 (c) Subtract 4p2q – 4pq - 5pq2 – 8p + 7q – 18
from 18 – 3p – 11q + 5pq – 2pq2 + 5p2q

Question 5
What are the coefficient of each term in the below expression?
4p2q2 + 4p2q2r2 - r2 +5
a)  4,4,-1,5
b)  4,4,1,5
c) 4,4r2 ,-r2, 5
d) None of these
Question 6
The product of a monomial and trinomial will be a
a)  monomial
b)  trinomial
c) binomial
d) None of these
Question 7
The exponents of a variable term in the polynomial is a
a) integers
b)  negative integers
c) positive integers
d) non -negative integers

Question 8
The expression pqr +rqp+qpr is a
a) Monomial
b)  trinomial
c) binomial
d) none of these

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Class 8 Maths Class 8 Science
Reference Books for class 8 Math

Given below are the links of some of the reference books for class 8 Math.

  1. Mathematics Foundation Course for JEE/Olympiad : Class 8 This book can take students maths skills further. Only buy if child is interested in Olympiad/JEE foundation courses.
  2. Mathematics for Class 8 by R S Aggarwal Detailed Mathematics book to clear basics and concepts. I would say it is a must have book for class 8 student.
  3. Pearson Foundation Series (IIT -JEE / NEET) Physics, Chemistry, Maths & Biology for Class 8 (Main Books) | PCMB Combo : These set of books could help your child if he aims to get extra knowledge of science and maths. These would be helpful if child wants to prepare for competitive exams like JEE/NEET. Only buy if you can provide help to the child while studying.
  4. Reasoning Olympiad Workbook - Class 8 :- Reasoning helps sharpen the mind of child. I would recommend students practicing reasoning even though they are not appearing for Olympiad.

You can use above books for extra knowledge and practicing different questions.

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