作者：cyndi silva 12 年以前
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Properties of Addition
Identity Property of Addition on W
Associate Property of Addition on W
Closure Property of Addition on W
Commutative Property of Addition on W
Continuous
Discrte
Place Value is the value of where the digit is in the number, such as units, tens, hundreds or further on. For example in the number 321, the place value of the 3 is in the hundreds place. It's value is 3 hundreds.
There are more place vlaues than 4 positions, however we will focus on 4 place values. The place alue title is cubes, flats, longs, and units.
cubes, flats, longs, units
b³ b² b¹ b⁰
Where as b represents the base of the place value.
Lattice Method
Column Addition
Add Left to right
Subset means every element of A is also an element of B. It is expressed like so: A ⊆ B.
Proper subset means every element of A is contained in B but at least one element of B is not contained in A. It is expressed like so: A ⊆ B = {1,2,3} ⊆ {1,2,3}.
Venn Diagram is a picture that relates the universe (represented by a box) and a number of subsets (represented by circles). Venn Diagram allows us to oranize the members of the universe based on common attributes.
Subset symbols and thier meanings.
The u is the symbol used to represent the universe.
The = symbol is used to represent that one element is the same as the other. It is called equal sign.
The symbol ∈ is the symbol titled element. It represents one of the objects.
The symbol ∉ is the symbol used to denote that the object is not an element.
The symbol ~ means there is a one to one correspondent between the sets. It's title is equivalent.
The symbol ∪ is titled union. It means the set of elements which are either in A or in B or in both.
The symbol ∩ it titled intersect. It means the set that contains all those elements that A and B have in common.
The symbol with a line top of A means elements are not in set A but are in the universe.
A sequence is an ordered list of objects, events, or numbers which may be refered to as elements of the sequence, members of the sequence or terms of the sequence.
In mathmatics, given a sequence we desire to determine if there is a rule which governs the sequence. If we assign each member f the swquence a number (n) based on its order in the sequence we can attempt to find a rule which describes the sequence. By assigning each member of a sequence a number based on order we can refer to specific numbers of the sequence by thier number; e.g. we will refer to the 4th number of the sequence a by writing a4.
Arithmetic sequences are sequences of numbers with a common defierence; that is if you subtract any two consecutive terms in the sequence the difference is the same.
-- Mathematic Class notes provided by Dr. Laura Watkins.
Arithmetic sequences are sequences of numbers with a common ratio; that is, if you form the ratio of any two consecutive terms in the sequence the ratio is the same.
-- Mathematic Class notes provided by Dr. Laura Watkins.
A recurrence relationship defines a sequence in which the current term is dependent on previous term(s).
- Mathematic Class notes provided by Dr. Laura Watkins.
Even numbers are multiple of 2. Represented by 2n.
Odd numbers are a multiple of 2 plus one. Represented by 2n + 1.
Comparing two seperate things.
This is the most common understanding of fractions. Of where a whole is divided and the fraction represents the part of the whole.
Cuisenaire rods are manipulatives in elementary schools that work for mathematic concepts. They come in ten different lengths, each length being a different color. The length of each rods is a multiple of the length of the shortest rod. Children will sponstaneously build trains with the cuisenaire rods.
Least common multiple is a pair of trains that is smallest or shortest rod.
What is the relationshio between a and LCM(a,b)? It is bigger. A is less than or equal to LCM (a,b). B is less than or equal to LCM (a,b).
How many different ways can one make a train using two numbers.
The colored train that is common to both numbers which has the biggest pieces. The size of that piece is the greatest common factor.
What is the relationship of the number and the GCF (a,b)? It is smaller. GCF (a,b) less than or equal to a. GCF(a,b) less than or equal to b.
To see whether one number is a factor of another number , we can begin by making alarge train using Cuisenaire Rods of only one color.
