Knowing Our Numbers

5 Topics | 5 Quizzes
Whole Numbers

5 Topics | 5 Quizzes
Playing With Numbers

10 Topics | 5 Quizzes
Basic Geometrical Ideas

12 Topics | 4 Quizzes
Understanding Elementary Shapes

9 Topics | 5 Quizzes
Fractions

13 Topics | 4 Quizzes
Integers

5 Topics | 5 Quizzes
Decimals

6 Topics | 4 Quizzes
Data Handling

9 Topics | 4 Quizzes
Mensuration

3 Topics | 4 Quizzes
Algebra

10 Topics | 4 Quizzes
Ratio and Proportion

3 Topics | 4 Quizzes
Practical Geometry

5 Topics | 4 Quizzes
Symmetry

8 Topics | 4 Quizzes
__Use of Variables in Common Rules__

__Rules from geometry__

Algebraic expressions can be used in formulating perimeter of figures.

Example: Let L be the length of one side then, the perimeter of:

An equilateral triangle = 3L.

A square = 4L.

A regular pentagon = 5L.

__Rules from Arithmetic__

- Commutativity of Addition

Let a and b be two variables, which can take any numerical value.

Then, a + b = b + a - Commutativity of Multiplication

Let a and b be two variables.

Then, a × b = b × a - Distributivity of multiplication over addition

Let a, b and c be three variables.

Then a × (b + c) = a × b + a × c - Associativity of addition

Let a, b and c be three variables.

Then, (a + b) + c = a + (b + c).

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