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JSS2: MATHEMATICS - 1ST TERM

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  1. Properties of Whole Numbers I | Week 1
    4Topics
    |
    2 Quizzes
  2. Properties of Whole Numbers II | Week 2
    4Topics
    |
    2 Quizzes
  3. Properties of Whole Numbers III | Week 3
    4Topics
    |
    1 Quiz
  4. Indices | Week 4
    2Topics
    |
    1 Quiz
  5. Laws of Indices | Week 5
    5Topics
    |
    1 Quiz
  6. Whole Numbers & Decimal Numbers | Week 6
    4Topics
    |
    1 Quiz
  7. Standard Form | Week 7
    3Topics
    |
    1 Quiz
  8. Significant Figures (S.F) | Week 8
    4Topics
    |
    1 Quiz
  9. Fractions, Ratios, Proportions & Percentages I | Week 9
    6Topics
    |
    1 Quiz
  10. Fractions, Ratios, Proportions & Percentages II | Week 10
    4Topics
    |
    1 Quiz
  11. Fractions, Ratios, Proportions & Percentages III | Week 11
    3Topics
    |
    1 Quiz
  12. Approximation & Estimation | Week 12
    1Topic
    |
    1 Quiz
Lesson Progress
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Small numbers are numbers less than zero and are called decimal fractions.

e.g  0.000 065,  0.004 etc.

To write small numbers, group them in three from the decimal point to the right.

e.g. 0.000000125  can be written as  0.000 000 125  

Example 1

Write these as decimal fractions and group the digits in three where necessary.

a. 10 millionth 

b. 25 hundredth

c. 68 x 10-7

d. \( \frac{150}{1000000} \)

Solution

a. 10 millionth = \( \frac{10}{1,000,000}\\ = \scriptsize 0.00001\)

b. 25 hundredth = \( \frac{25}{100} \\= \scriptsize 0.25 \)

c. 68 x 10-7 = \( \frac{68}{10,000,000} \\= \scriptsize 0.0000068 \)

d. \( \frac{150}{1,000,000} \\ = \scriptsize 0.00015\)

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