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Grade 9 - Mathematics

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  1. Mastering the fundamentals

    1.1 Integers Sample
    1 Topic
  2. 1.1 Integers
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    1 Quiz
  3. Chapter 1: EXPANSION
    1.1 SIMPLE EXPANSION OF BRACKETS
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    1 Quiz
  4. 1.2 WORD PROBLEMS LEADING TO EXPANSION OF BRACKETS
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    1 Quiz
  5. 1.3 SIMPLIFYING EXPRESSIONS INVOLVING BRACKETS
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    1 Quiz
  6. 1.4 SOLVING EQUATIONS INVOLVING BRACKETS
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    1 Quiz
  7. CHAPTER 2: BINOMIAL EXPANSION
    2.1 EXPANSION INVOLVING TWO BRACKETS (METHOD 1 AND METHOD 2)
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    1 Quiz
  8. 2.2 EXPANSION INVOLVING TWO BRACKETS - Method 3
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    1 Quiz
  9. 2.3 FURTHER BINOMIAL EXPANSION
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  10. 2.4 Problems involving binomial expansion
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    1 Quiz
  11. CHAPTER 3: HIGHEST COMMON FACTOR
    3.1 HCF OF NUMBERS BY THE DIVISION METHOD, PRIME FACTORISATION AND BY USING FACTORS/DIVISORS
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    1 Quiz
  12. 3.2 HCF of algebraic expressions
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  13. CHAPTER 4: FACTORISATION
    4.1 Factorisation by HCF method
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    1 Quiz
  14. 4.2 FACTORISATION BY GROUPING
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  15. 4.3 Factorisation of D.B.T.S
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  16. 4.4 Factorisation of quadratic expressions of the form x²+ax+b
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  17. 4.5 Simplify algebraic fractions by factorisation
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    1 Quiz
  18. CHAPTER 5: QUADRATIC EQUATIONS
    5.1 Simple quadratic equations
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    1 Quiz
  19. 5.2 Solving simple quadratic equations and quadratic equations of the form a x b=0
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    1 Quiz
  20. 5.3 Solving quadratic equations by factorisation
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  21. 5.4 Problems involving quadratic equations
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    1 Quiz
  22. CHAPTER 6: INDICES
    6.1 Laws of indices
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    1 Quiz
  23. 6.2 Laws of indices
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  24. 6.3 Laws of indices
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  25. 6.4 Equations involving indices
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    1 Quiz
  26. CHAPTER 7: MATRICES
    7.1 Introduction and order of matrices
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    2 Quizzes
  27. 7.2 Type of matrices
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    1 Quiz
  28. 7.3 Addition and subtraction of matrices
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    1 Quiz
  29. 7.4 Multiplication of matrices by a scalar
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  30. 7.5 Multiplication of matrices
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  31. CHAPTER 8: ALGEBRAIC MANIPULATION
    8.1 Subsititution
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  32. 8.2 Subject of formula
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  33. CHAPTER 9: INQUALITIES & INEQUATIONS
    9.1 Representation of inequalities on a number line
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    1 Quiz
  34. 9.2 Solving inequations
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    1 Quiz
  35. CHAPTER 10: SIMULTANEOUS EQUATIONS
    10.1 Using elimination method to solve simultaneous equations with same coefficients and same signs
    1 Topic
  36. 10.2 Using elimination method to solve simultaneous equations with same coefficients and different signs
    1 Topic
  37. 10.3 Using elimination method to solve simultaneous equations with different coefficients
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  38. 10.4 Word problems leading to simultaneous equations
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    1 Quiz
  39. CHAPTER 11: PYTHAGORAS THEOREM
    11.1 Using Pyhtagoras theorem in right angled triangles
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    1 Quiz
  40. 11.2 Find area of right angled triangles and shortest distance
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    1 Quiz
  41. 11.3 Apply Pythagoras theorem in isosceles triangles
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    1 Quiz
  42. CHAPTER 12: TRIGONOMETRY
    12.1 Trigonometrical Ratios
    4 Topics
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    2 Quizzes
  43. 12.2 Finding sides using trigonometry
    4 Topics
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    1 Quiz
  44. 12.3 Find angles using trigonometry
    7 Topics
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    1 Quiz
  45. 12.4 Problems involving trigonometry
    3 Topics
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    1 Quiz
  46. CHAPTER 13: AREAS AND PERIMETER
    13.1 Areas and perimeter of parallelogram
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    1 Quiz
  47. 13.2 Areas and perimeter of trapezium
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    1 Quiz
  48. CHAPTER 14: CIRCLES
    14.1 Circumference of circles
    6 Topics
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    1 Quiz
  49. 14.2 Length of arc
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    1 Quiz
  50. 14.3 Area of circles
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  51. 14.4 Area of sector
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  52. CHAPTER 15: SOLIDS
    15.1 Volume and surface area of cubes and cuboids
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  53. 15.2 Volume of right prisms
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  54. 15.3 Surface area of right prisms
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  55. 15.4 Volume of cylinder
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  56. 15.5 Surface area of cylinder
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  57. CHAPTER 16: COORDINATE GEOMETRY
    16.1 Plotting and identifying coordinates
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  58. 16.2 Equation of horizontal and vertical lines
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  59. 16.3 Gradient of lines
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  60. 16.4 Gradient given the line
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  61. 16.5 Finding equation of lines using gradient
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  62. 16.6 Intersection of lines
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  63. CHAPTER 17: VECTORS
    17.1 Vectors and drawing of vectors
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    1 Quiz
  64. 17.2 Operations on vectors
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  65. 17.3 Equations involving vectors
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  66. 17.4 Parallel vectors
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  67. 17.5 Length of a vector
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  68. CHAPTER 18: TRANSFORMATION
    18.1 Describe and perform translation
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  69. 18.2 Describe and perform reflection
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  70. 18.3 Reflection in a mirror line
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  71. CHAPTER 19: STATISTICS
    19.1 Mean in a set of numbers
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  72. 19.2 Mode in a set of numbers
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  73. 19.3 Median in a set of numbers
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  74. 19.4 Tally marks and frequency table
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  75. 19.5 Mean in a frequency table
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  76. 19.6 Mode in a frequency table
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  77. 19.7 Median in a frequency table
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  78. 19.8 Bar Chart
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  79. 19.9 Pie Chart
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  80. CHAPTER 20: PROBABILITY
    20.1 Probability of a single event
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  81. 20.2 Probability of a combined events
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  82. CHAPTER 21: PERSONAL & HOUSEHOLD FINANCE
    21.1 Earning and commission
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  83. 21.2 Conversion of currencies
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    2 Quizzes
  84. 21.3 Discounts
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  85. 21.4 Profit and loss
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  86. 21.5 Simple interest
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  87. CHPATER 22: PATTERNS AND SEQUENCES
    22.1 Completing sequences
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  88. 22.2 Fibonacci sequence
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  89. 22.3 Sequence of ordered pairs
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Lesson 1, Topic 1
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1.1.1 Types of numbers

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Introduction to number system (BASICS)

This lesson will deal with the first few types of numbers in the number system, namely natural numbers, whole numbers and integers. This first video will provide you with the necessary information to enable you to distinguish between the different types of numbers.

Note that you will have to answer the questions set just after each video before proceeding to the next one.

Operations on integers part 1

In this video, you will learn how to add and subtract integers to enable you to easily deal with various other topics in mathematics.

Operations on integers part 2

In this video, we will deal with relatively harder cases of addition and subtraction of integers.