5 min read
2026-02-18
Save intermediate results to memory (M+) so you don't have to write them down separately. This significantly speeds up multi-step calculations.
A common mistake is computing trigonometric functions in the wrong mode. Always check whether DEG or RAD is selected.
Parentheses help control the order of operations and avoid errors:
`2 + 3 × 4 = 14` (standard order)
`(2 + 3) × 4 = 20` (correct if you need the sum first)
Use the built-in constants π and e instead of manually entering approximate values.
Press the "Shift" or "2nd" button to access inverse functions: arcsin, arccos, arctan.
For large numbers, use scientific notation: 3.5 × 10⁸ is entered as 3.5E8.
Review previous results to track the course of solving a problem.
See also: Percentage Calculator, Discount Calculator
Calculator with history, percentages, parentheses and scientific functions
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