Monday, January 6, 2014


Enable students to
·      develop the necessary process skills for the acquisition and application of mathematical concepts and skills;
·      develop the mathematical thinking and problem solving skills and apply these skills to formulate and solve problems;
·      recognise and use connections among mathematical ideas, and between mathematics and other disciplines;

Scenario 2

SP Services supplies electricity to households and businesses in Singapore. It also provides billing and payment collection on behalf of various utility service providers such as the Public Utilities Board for water charges, City Gas for gas charges and the respective refuse companies for refuse removal fees. The bill charges are for the period reflected here (ie 21 May 2013 to 19 Jun 2013, as shown in the sample bill). 

  1. What information does each component of the bill give?
  2. Provide information on what should be the (i) constants and (ii) variables.
  3. POST your responses as comments.

1 comment:

  1. luke-john leeJanuary 5, 2014 at 9:39 PM
    1) Summary: States leftover charges from last month, total current charges that have to be paid.

    2) Due Date: States the latest date when the bill has to be paid.

    3) Meter Reading: States when the meters are read or the reading is estimated.The meters are attached to each housing unit to track electricity usage. Some months, the meter is not read, and consumption is estimated on the reading from the previous month.

    4) Consumption units: Measured in kWh (kilowatts per hour). Represents the water, electricity and gas that have been used in the past month.

    5) Tariff rates: The amount of money that has to be paid per kWh of resources used.

    6) Sanitary Appliance Fee and Waterborne Fee: Fees that cover the cost of treating used water and maintaining the used water network. Sanitary Appliance Fee is charged based on the number of Appliances that use water while Waterborne Fee is charged based on amount of water used.

    7) Refuse removal: Charges for removing refuse from the housing estate.

    8) Water conservation tax: A tax charged for consumption of water, meant to discourage excess water usage.

    9) Bar graphs for past consumption: Graphs that monitor usage patterns over past months for the resources.