Class 7 - Mathematics - Chapter - Algebraic Expressions (Very Short Questions and Answers) (#cbsenotes)(#eduvictors)

Algebraic Expressions 

(Short Questions and Answers)

Class 7 - Mathematics 

Worksheet


Fill in the blanks
Q1: An algebraic expression containing three terms is called a __________.

Q2: Factors of -5x²y²z are : _____________________________________.

Q3: Sum or difference of two like terms is a ______________.

Q4: -5a²b and -5b²a are ________________ terms.

Q5: In the expression 2πr, the algebraic variable is ___________ and 2π is ________.



Q6: Number of terms in a monomial is ________.

Q7: The speed of car is 55 km/h. The distance covered in y hours is ___________.

Q8: On adding a monomial __________ to -2x+4y²+z, the resulting expression becomes a binomial.

Q9: If Rohit has 5xy toffees and Shantanu has 20yx toffees, then Shantanu has ___________ more toffees.

Q10: Is (3a-b+3)-(a+b) is a binomial? (True/False)

Q11: The side length of the top of square table is 'a'. The expression for perimeter is ________.

Q12: Coefficient of x in -9xy²z is _________

Q13: The sum of 3x and 4y is 8. Express it in algebraic form.

Q14: 3x subtracted from 89 gives 44. Express it in algebraic form.

Q15: If 23 is a constant and x is a variable, 23 + x is constant. (True or False)


Answers:
1: trinomial
2: 5 × x × x × y × y × z
3: like term
4: unlike terms
5: r, constant
6: one
7: 55y km
8: +2x or -4y² or -z
9: 15xy more toffees
10: False.
(3a-b+3)-(a + b)= 3a-b+3-a-b
= 3a-a-b-b + 3 = 2a-2b+ 3
The expression has three terms, it is a trinomial.

11: 4a
12: -9y²z
13: 3x + 4y = 8
14: 89 – 3x = 44
15: False. Sum of a constant and a variable is also variable.

☛See also:

Ch 1 - Integers (NCERT Ex 1.2)
Ch 1 - Integers (NCERT Ex 1.3)

Ch 2 - Decimals - Multiplication and Division (Worksheet)
Ch 2 - Fractions and Decimals - NCERT Exercise Answers 2.6

Ch 3 - Data Handling (NCERT Ex 3.4)

CH 4 - Simple Equations (NCERT Ex 4.4)
CH 4 - Simple Equations (Worksheet)

CH6 - Lines and Angles (Worksheet)

CH8 - Comparing Quantities (Ratio and NCERT Ex 8.1)
CH8 - Comparing Quantities (Percentage and NCERT Ex 8.2) 
CH8 - Comparing Quantities(NCERT Ex 8.3)

Chapter 12 - Algebraic Expressions (Revision Sheet)
Chapter 12 - Algebraic Expressions - NCERT Solution 12.1

Chapter 13: Exponents and Powers (MCQs)

Rules of Divisibility (Another post on Divisibility Rules)
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Maths PSA Quiz (2016)
Maths SA2 Sample Question Paper (2016-17)
Maths SA2 Sample Question Paper (2016-17) - set 2
Maths SA2 Sample Question Paper (2016-17) - set 3