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An expression consists of terms that are written with arithmetical
signs between them such as the addition, subtraction, division and
multiplication signs.
Like Terms
Terms with the same pronumeral (or pronumerals) are called like terms.
Unlike Terms
Terms with different pronumerals are called unlike terms.
Addition (or Subtraction) of Like Terms
Clearly, 5 dollars + 10 dollars = 15 dollars
If the dollars are represented by the pronumeral d, then the
statement
5 dollars + 10 dollars = 15 dollars
can be described by
5d + 10d = 15d
From the above discussion, we can state that:
Only like terms can be added (or subtracted) to simplify an
expression.
Example 4
Solution:
Example 5
Solution:
Key Terms
expression, arithmetical
signs, like terms, unlike terms,
simplify an expression
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