The definition of subitize defined in Dictionary.reference.com is to perceive
at a glance the number of items presented, the limit for humans being about
seven.

The
following definitions and how to remember is from

*http://www.mathsisfun.com/numbers/cardinal-ordinal-nominal.html*:##
__Cardinal Numbers__

__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__

__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:* **"****Ord****inal says what ****Ord****er things are in".**

*How to remember:***"****Ord****inal says what****Ord****er 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".**

*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.

## No comments:

## Post a Comment