continued from previous material
Replacing a numerical expression by the simplest name for its value is called simplifying the expression. When you simplify a numerical expression, you use the following principle.
Substitution Principle
An expression may be replaced by another expression that has the same value.
Example 1 Simplify each expression.
Replacing each variable in a variable expression by a given value and simplifying the result is called evaluating the expression or finding the value of the expression.
Example 2
In Examples 1 and 2 the parentheses show how the variables and numbers in the expression are to be grouped. Notice that expression within parentheses should be simplified first.
Example 3
0 komentar:
Posting Komentar