Wednesday, November 5, 2014

Vocabulary for 3.OA.3

3.OA.3 Vocabulary

An EQUATION is a number sentence with two sides that are equal.
An equation says that two things are equal. It will have an equals sign "=" like this:
That equation says: what is on the left (x + 2) 
is equal to what is on the right (6)

A SYMBOL is a picture that is used in place of a number or words.
A pattern or image used instead of words.

Another example: "+" is the symbol for "plus"

An UNKNOWN is a number you are trying to find in an equation.
The letter "x" is often used in algebra to mean a value that is not yet known. 

It is called a "variable" or sometimes an "unknown".

In x + 2 = 7, x is a variable, but we can work out its value if we try!

A variable doesn't have to be "x", it could be "y", "w" or any letter or symbol.

PARTITIONING is when you split something up into equal parts or shares.  This is a great website to explain partitioning!  Partitioning with division.

IXL has great practice for this standard.  LearnZillion has terrific lessons on this standard.  Khan Academy is also a great resource!

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