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kOrder of Operations and Levels
Operations are performed in the following order of prec-
edence.
1. Functions
2. x
y
, x
1/y
, R →P, P →R, nPr, nCr
3. ҂, Ȗ
4. ѿ, Ҁ
• Operations with the same precedence are performed from
left to right, with operations enclosed in parentheses per-
formed first. If parentheses are nested, the operaitons en-
closed in the innermost set of parentheses are performed
first.
• Registers L
1
through L
6
store operations. There are six re-
gisters, so calculations up to six levels can be stored.
• Each level can contain up to three open parentheses, so
parentheses can be nested up to 18 times.
• Example: The following operation uses 4 levels and 5
nested parentheses.
2
- O O O 3 + 4 - O O 5 + 4
The table below shows register contents following the
above input.