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JSS1: MATHEMATICS - 1ST TERM

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  1. Whole Numbers I | Week 1
    3 Topics
    |
    1 Quiz
  2. Whole Numbers II | Week 2
    1 Topic
    |
    1 Quiz
  3. Counting in Base Two | Week 3
    4 Topics
    |
    1 Quiz
  4. Arithmetic Operations | Week 4
    3 Topics
    |
    1 Quiz
  5. Lowest Common Multiple (LCM) | Week 5
    2 Topics
    |
    1 Quiz
  6. Highest Common Factor | Week 6
    1 Topic
    |
    1 Quiz
  7. Fraction | Week 7
    7 Topics
    |
    1 Quiz
  8. Basic Operations with Fractions I | Week 8
    3 Topics
    |
    1 Quiz
  9. Basic Operations with Fractions II | Week 9
    1 Topic
    |
    1 Quiz
  10. Directed Numbers | Week 10
    3 Topics
    |
    1 Quiz
  11. Estimation and Approximation I | Week 11
    3 Topics
    |
    1 Quiz
  12. Estimation and Approximation II | Week 12
    6 Topics
    |
    1 Quiz



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Approximation means rounding off. We round off numbers to simplify them so they will be easy to use and easy to remember.

Example:  Ehime bought a pair of shoes for N90. If someone asks him the price of the shoes, he may say the price is N100.

  • This is called rounding up where the new number is bigger and the given number.
  • N90 ≈  N100   (means N90 is approximately equal to N100).

Example: A dress costs N81. You are more likely to say that the cost of the dress was N80.

  • This is called rounding down where the new number is smaller than the given number.
  • N81   ≈   N80  (This means N81 is approximately equal to N80).

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