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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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To find the square root of decimals, change the decimals to fractions.

Example

Evaluate the following

1. \( \scriptsize \sqrt {0.25} \)

2. \( \scriptsize \sqrt {0.64} \)

3. \( \scriptsize \sqrt {0.36} \)

4. \( \scriptsize \sqrt {12.25} \)

5. \( \scriptsize \sqrt {0.25 \; \times \; 0.64} \)

Solution

1. \( \scriptsize \sqrt {0.25} \\= \sqrt{\normalsize \frac{25 }{100}} \\ = \normalsize \frac{5}{10} \\ = \scriptsize 0.5 \)

2. \( \scriptsize \sqrt {0.64} \\ = \sqrt{\normalsize \frac{64 }{100}}\\ = \normalsize\frac{8}{10} \\ = \scriptsize 0.8 \)

3. \( \scriptsize \sqrt {0.36} \\= \sqrt{\normalsize \frac{36 }{100}}\\ = \normalsize\frac{6}{10} \\ =\scriptsize 0.6 \)

4. \( \scriptsize \sqrt {12.25}\\ = \sqrt{ \normalsize\frac{1225 }{100}}\\ = \sqrt{ \normalsize\frac{49 \: \times \: 25 }{4 \: \times \: 25}} \\ = \sqrt{ \frac{49 }{4}} \\= \frac{7}{2} \\ = \scriptsize 3 \normalsize \frac{1}{2} \)

5. \( \scriptsize \sqrt {0.25 \: \times \:0.64} \\ = \sqrt{\normalsize \frac{25 }{100}} \: \times \: \sqrt{\normalsize \frac{64 }{100}}\\ = \frac{5}{10} \: \times\: \frac{8}{10} \\= \frac{40}{100}\\ = \frac{4}{10} \\ = \scriptsize 0.4 \)

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