Class notes Mathematics

GRADE 8 MATHEMATICS
FOR PRACTISE




FEBRUARY 1, 2025
L.S

, Topic 1: Numbers



- Integers: whole numbers, either positive, negative, or zero

- Rational numbers: numbers that can be expressed as a fraction, e.g. 3/4

- Irrational numbers: numbers that cannot be expressed as a fraction, e.g.
π

- Real numbers: all rational and irrational numbers

- Properties of numbers:

- Commutative property: a + b = b + a

- Associative property: (a + b) + c = a + (b + c)

- Distributive property: a(b + c) = ab + ac



Topic 2: Algebra



- Variables: letters or symbols that represent unknown values

- Expressions: combinations of variables, numbers, and operations

- Equations: statements that say two expressions are equal

- Inequalities: statements that say one expression is greater than or less
than another

- Solving equations and inequalities:

- Adding or subtracting the same value to both sides

- Multiplying or dividing both sides by the same non-zero value

- Using inverse operations to isolate the variable



Topic 3: Geometry



- Points: locations in space, represented by coordinates (x, y)

- Lines: sets of points that extend infinitely in two directions

- Angles: formed by two lines or rays that share a common endpoint

- Types of angles: