Counting Method / June 2, 2018 / Kenzie Bowser
Cardinality: When a child is counting a collection, the last item in the collection is the amount of the collection. For instance, if a child counts 1,2,3,4,5,6, 7 marbles, knowing that the last number represents the number of marbles in the collection is cardinality. When a child is prompted to recount the marbles how many marbles there are, the child doesn't yet have cardinality. To support this concept, children need to be encouraged to count sets of objects and then probed for how many are in the set. The child needs to remember the last number represents the quantity of the set. Cardinality and quantity are related in counting concepts.
The integers on the left side of zero (0) are called negative numbers, and are represented by a negative sign (−) placed before them, as in −5, −10, and −15.* The integers on the right side of 0 are called positive numbers. Examples include 5, 10, and 15. The positive integers are known as counting numbers or natural numbers. The positive integers and 0 are called whole numbers. Zero is an integer but it is neither positive nor negative.