Page 120 - Maths Skills - 7

7 7 Algebraic E
Algebraic Expressionsxpressions

Learning Outcomes

In this chapter, you will learn about:
� Terms of an expression � Degree of an expression � Addition and subtraction of algebraic expression
� Factor of a term � Types of algebraic expressions � Value of an expression

Boot-Up (To Recapitulate Previous Knowledge of Concepts)

COMPETENCY BASED QUESTIONS

A. Multiple-Choice Questions
1. In algebra, letters may stand for
(i) known quantities (ii) unknown quantities

(iii) fixed numbers (iv) none of these
2. On simplifying expression 10x + 8x, answer will be
(i) 8x (ii) 10x (iii) 18x (iv) 180x

3. Anaya is y years of age now. 5 years ago, her age was
(i) (5 – y) years (ii) (5 + y) years
(iii) (y – 5) years (iv) (5 × y) years

4. What is the algebraic expression of the word expression “subtract eight times of b from ten times of c”?

(i) 2bc (ii) 8b – 10c (iii) 8c – 10b (iv) 10c – 8b

B. Fill in the Blanks
1. x = __________ is the solution of the equation 4x + 4 = 4 .
2. x exceeds y by 7 can be expressed as __________ .

3. Each side of a regular hexagon is denoted by y. The perimeter of hexagon in terms of y is __________ .
4. One-third of a number added to itself gives 8, can be expressed as __________ .

C. Write ‘T’ for true and ‘F’ for false Statements

1. The three sides of a triangle are x, a and b unit. The perimeter of the triangle is (a + b) unit.

2. 0 is the solution of the equation x + 1 = 1.

3. The equations x + 1 = 0 and 2x + 2 = 0 have same solution.
4. If m is a whole number, then 2m denotes a multiple of 2.