Sunday, August 18, 2013

Reflection 3 - August 14, 2013

The definition of subitize defined in is to perceive at a glance the number of items presented, the limit for humans being about seven.
This page tell “What is it? Why teach it?”

The following definitions and how to remember is from

Cardinal Numbers

  • A Cardinal Number is a number that says how many of somethig there are, such as one, two, three, four, five.
  • A Cardinal Number answers the question "How Many?" It does not have fractions or decimals, as it is only used for counting.
  • How to remember: "Cardinal is Counting"

Ordinal Numbers

  • An Ordinal Number is a number that tells the position of something in a list. 1st, 2nd, 3rd, 4th, 5th etc.
  • How to remember: "Ordinal says what Order things are in".

Nominal Numbers

  • A Nominal Number is a number used only as a name, or to identify something (not as an actual value or position)
  • How to remember: "Nominal is a Name".

What have I learnt for this third session?
  • Subitizing in Mathematics
  • Reinforcement of cardinal, ordinal and nominal numbers
  • Revisit what I learned as a student on subtraction using fractions.

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