# Algebraic Expressions/ CBSE Class 7 Mathematics/Worksheet

**Algebraic Expressions/CBSE Class 7 Mathematics /Worksheet is about the Model Questions that you can expect for Yearly Examination. Here you can find out practice problems for CBSE Class 7 Mathematics.**

## Algebraic Expressions /CBSE Class 7 Mathematics/Extra Questions for Practice/Worksheet

**Answer the following questions:**

**Write the coefficient of x in 5 – x?**

Answer: -1**Write the coefficient of y in 4x – 3y?**

Answer: -3**Write the coefficient of x in**

a) 2x + y

b) 10 + 2xy

c) x + y + z

Answer:

a) 2

b) 2y

c) 1**Identify the pairs of like and unlike terms:**

a) 500, -20

b) -3, a, b

c) –y, -2y

Answer:

a) Like terms

b) Unlike terms

c) Like terms**Classify the following into monomials, binomials and trinomials:**

a) -5

b) -3 + y

c) x + 2y

d) 3a + 2b + c

Answer:

a) Monomial

b) Binomial

c) Binomial

d) Trinomial**Subtract 2xy – x from 3x + 5xy**

Answer:

3x + 5xy – (2xy – x) = 3x + 5xy – 2xy + x = 4x + 3xy**Find the value of 2xy + 3x + y when x = 1, y = 2**

Answer:

2 x 1 x 2 + 3 x 1 + 2 = 4 + 3 + 2 = 9**Find the sum of 3abc, -5abc, 7abc and -2abc**

Answer:

3abc – 5abc + 7abc – 2abc = 10abc – 7abc = 3abc**Identify the constant terms in the following expressions:**

a) -5 + 5y

b) 3xy – 3y + 3

Answer:

a) -5

b) 3**If P = 3a + 2b and Q = -7a – 3b, find the value of 2P + Q**

Answer:

2P + Q = 2(3a + 2b) + (-7a – 3b)

= 6a + 4b – 7a – 3b

= -a + b**Find the value of mn + np + mp if m = 1, n = -1, p = 2**

Answer:

1 x (-1) + (-1) x 2 + 1 x 2 = (-1) + (-2) + 2 = -1**If the length of a side of a square is 2y – 5, find the expression which represents the perimeter of a square?**

Answer:

Perimeter = 4 x side = 4 (2y – 5) = 8y – 20**The length and breadth of a rectangle are 3x – 2y and**

-2x + 3y.Find the perimeter of the rectangle?

Answer:

Perimeter = 2 (l + b) = 2(3x – 2y -2x + 3y)= 2(x +y)**Add 3xy – 5x and 6xy – 3x**

Answer:

3xy – 5x + 6xy – 3x = 9xy – 8x**Write the algebraic expression for the following statements:**

a) Multiply x by 4 and add 5 to the product

b) Multiply y by 3 and subtract 2 from the product

c) Multiply the variable x by 3

d) Product of numbers 2 and y subtracted from 5

e) Subtraction of 5 from twice a number x

f) Number 3 added to 4 times the product of numbers m and n

Answer:

a) 4x + 5

b)3y – 2

c) 3x

d) 5 – 2y

e) 2x – 5

f) 3 + 4mn