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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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Topic Content:

  • Rounding Off Numbers to a Specific Number of Decimal Places

A number such as 270.8143 is an example of a decimal number.

Screenshot 2023 08 19 at 09.46.48

To find the number of decimal places (d.p) simply count the number of figures after the decimal point. Thus, this number has 4 d.p.

Screenshot 2023 08 19 at 09.56.411

Example:

Find the number of decimal places in the following numbers.

a) 47.04
b) 0.395

Solution:

a) 47.04 -> 2 d.p
b) 0.395 -> 3 d.p

d.p. means decimal places.

Rounding Off Numbers | Specific Number of Decimal Places:

Sometimes, it is useful to round decimal numbers to a specific number of decimal places or to the nearest whole number.

To round a decimal number to a given number of decimal places, do the following:

 

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