SCERT AP 7th Class Maths Solutions Pdf Chapter 9 Algebraic Expressions Ex 9.1 Textbook Exercise Questions and Answers.

## AP State Syllabus 7th Class Maths Solutions 9th Lesson Algebraic Expressions Ex 9.1

Question 1.

Write numerical and algebraic coefficients of the following terms.

(i) 4xy

Answer:

Given term is 4xy

Numerical coefficient: 4

Algebraic coefficient: xy

(ii) – 7a^{2} b^{3} c

Answer:

Given term is – 7a^{2} b^{3} c

Numerical coefficient: – 7

Algebraic coefficient: a^{2}b^{3}c

(iii) \(\frac{p q}{2 r}\)

Answer:

Given terra is \(\frac{p q}{2 r}\)

Numerical coefficient: \(\frac{1}{2}\)

Algebraic coefficient: \(\frac{p q}{r}\)

(iv) – 6mn

Answer:

Given term is – 6mn

Numerical coefficient: – 6

Algebraic coefficient: mn

Question 2.

Write the number of terms in each of the following expressions and write ’ them:

(i) 5 – 3t^{2}

(ii) 1 + t^{2} + t^{3}

(iii) x + 2xy + 3y

(iv) 100m + 1000n

(v) – p^{2}q^{2} + 7pq

Answer:

Question 3.

In – 5ab^{2}c write the coefficients of

(i) b^{2}c

(ii) – b^{2}c

(iii) – 5abc

(iv) 5ac

(v) ab^{2}

(vi) – 5ab

Answer:

Given term is – 5ab^{2}c

(i) Coefficient of b^{2}c is – 5a

(ii) Coefficient of – b^{2}c is 5a

(iii) Coefficient of – 5abc is b

(iv) Coefficient of 5ac is – b^{2}

(v) Coefficient of ab^{2} is – 5c

(vi) Coefficient of – 5ab is bc

Question 4.

Write term containing x and coefficient of x for the following algebraic expressions.

(i) 2x + 5y

(ii) -x + y + 3

(iii) 6y^{2} – 7xy

Answer: