


Review of Introductory Mathematics
FOUR BASIC ARITHMETIC OPERATIONS
10 ÷ 5 = 2
b.
Perform addition and subtraction operations from left to right.
c.
The final answer is 2 + 12  2  6 = 6
There may be cases where several operations will be performed within multiple sets of
parentheses. In these cases you must perform all operations within the innermost set of
parentheses and work outward. You must continue to observe the hierarchical rules through out
the problem. Additional sets of parentheses may be indicated by brackets, [ ].
Example:
Solve the following equation:
[2 ( 3 + 5)  5 + 2] x 3 = ______
Solution:
a.
Perform operations in the innermost set of parentheses.
3 + 5 = 8
b.
Rewriting the equation:
[2 8  5 + 2] x 3 =
c.
Perform multiplication prior to addition and subtraction within the brackets.
[16  5 + 2] x 3 =
[11 + 2] x 3 =
[13] x 3 =
d.
Perform multiplication outside the brackets.
13 x 3 = 39
Rev. 0
Page 17
MA01




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