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JSS2: MATHEMATICS - 1ST TERM

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  1. Properties of Whole Numbers I | Week 1
    4 Topics
    |
    1 Quiz
  2. Properties of Whole Numbers II | Week 2
    4 Topics
    |
    1 Quiz
  3. Properties of Whole Numbers III | Week 3
    5 Topics
    |
    1 Quiz
  4. Indices | Week 4
    2 Topics
    |
    1 Quiz
  5. Laws of Indices | Week 5
    5 Topics
    |
    1 Quiz
  6. Whole Numbers & Decimal Numbers | Week 6
    4 Topics
    |
    1 Quiz
  7. Standard Form | Week 7
    3 Topics
    |
    1 Quiz
  8. Significant Figures (S.F) | Week 8
    4 Topics
    |
    1 Quiz
  9. Fractions, Ratios, Proportions & Percentages I | Week 9
    6 Topics
    |
    1 Quiz
  10. Fractions, Ratios, Proportions & Percentages II | Week 10
    4 Topics
    |
    1 Quiz
  11. Fractions, Ratios, Proportions & Percentages III | Week 11
    3 Topics
    |
    1 Quiz
  12. Approximation & Estimation | Week 12
    1 Topic
    |
    1 Quiz
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Topic Content:

  • Multiplying by Power of 10
    • Positive power of 10
    • Negative power of 10

1. Positive power of 10:

To multiply a decimal number by the positive power of 10, move the decimal point by the number of times the power appears to the right e.g.

Worked Example 6.2.1:

Calculate the value of:

a. 2.3 × 106

b. 5.3467 × 102

c. 5.3467 × 101

d. 5.3467 × 103

Solution

a. 2.3 × 106

Screenshot 2023 08 20 at 10.14.08

= 2,300,000

b. 5.3467 × 102

Screenshot 2023 08 20 at 10.21.27

=    534.67

c. 5.3467 × 101

Screenshot 2023 08 20 at 10.23.48

= 53.467

d. 5.3467 × 103

Screenshot 2023 08 20 at 10.26.42

= 5346.7

2. Negative power of 10:

To multiply a decimal number by a negative power of 10, move the decimal point by the number of times the power appears to the left.

Worked Example 6.2.2:

Evaluate the following:

a. 2.3 × 10-6

b. 5.3467 × 10-1

c. 5.3467 × 10-2

d. 5.3467 × 10-3

Solution

a. 2.3 × 10-6

Screenshot 2023 08 20 at 11.39.09

= 0.0000023    

b. 5.3467 × 10-1

Screenshot 2023 08 20 at 14.15.33 1

= 0.53467

c. 5.3467 × 10-2

Screenshot 2023 08 20 at 14.14.23

= 0.053467

d. 5.3467 × 10-3

Screenshot 2023 08 20 at 14.21.27

= 0. 0053467