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JSS1: MATHEMATICS - 2ND TERM

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  1. Algebraic Processes | Week 1
    4 Topics
    |
    1 Quiz
  2. Simplification of Algebraic Expressions | Week 2
    4 Topics
    |
    1 Quiz
  3. Simplification of Algebraic Expressions 2 (Use of Brackets) | Week 3
    4 Topics
    |
    1 Quiz
  4. Simple Equations | Week 4
    1 Topic
    |
    1 Quiz
  5. Simple Equations II | Week 5
    3 Topics
    |
    1 Quiz
  6. Plane Shapes I | Week 6
    5 Topics
    |
    2 Quizzes
  7. Plane Shapes II | Week 7
    7 Topics
    |
    1 Quiz
  8. Plane Shapes III | Week 8
    7 Topics
    |
    1 Quiz
  9. Decimal and Percentages I | Week 9
    2 Topics
    |
    1 Quiz
  10. Decimal and Percentages | Week 10
    3 Topics
    |
    1 Quiz



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In Mathematics, a variable is a quantity that can change. Letters are used to represent these changing, unknown quantities in arithmetic, 4 x 2  is a short way of writing  4  +  4.

Similarly, in algebra, 5 x a is a short form for  \( \scriptsize a \: + \: a \: + \: a \: + \: a \: + \: a \)

We usually shorten \(\scriptsize 5 \: \times \: a \: to \: 5a\)

\( \scriptsize 5a \\ \scriptsize= 5 \: \times \: a \\ \scriptsize = a \: + \: a \: + \: a \: + \: a \: + \: a \)

ex1 e1608464951859
ex2 e1608465193528

Example

Write down the coefficients of the following expressions:

i. 3a – 5b
ii. 6d2 + 2d 
iii. -18ab2
iv. x2 – xy3

Solution

i. The coefficient of a = 3, b = – 5

ii. The coefficient of d2 = 6, d = 2

iii. The coefficient of ab2 = -18

iv. The coefficient of x2 = 1, xy3 = -1

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