We have seen in past activities to represent various situations in which the numbers vary or simply know their value, letters are used. We find formulas
combining letters with numbers using known operations, in which letters represent numbers to be calculated ( unknowns) or numbers that can take many values \u200b\u200b( variables).
Such expressions are called algebraic expressions or literal expressions.
Here's how the calculations are made when working with algebraic expressions. That is, how to perform the operations that we know when we work with algebraic expressions and not just numbers. Previously
we know some "names" that are used frequently. Read the fact sheet below and make the proposed activities. Monomials
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DISTRIBUTIVE PROPERTY
It is now essential that you review the distributive property . It is used quite frequently in algebraic calculations.
Or we can write this:
Because the multiplication satisfies the commutative property , one that says that the order of factors does not alter the product, remember?
Watch this property is used to add or subtract like monomials.
You can only add or subtract monomials that are similar. Because, just by having the same literal part, you may take it as a common factor .
To multiply monomials need not be similar. The multiplication can be done forever.
is important to remember the properties of the multiplication of powers with the same base.
PROPERTY DISTRIBUTION EXPANDED. Notes
now this:
Our rectangle is split into four. Move the red dots and see the expressions written below the figure.
How would you write in symbols this property?
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