Prefix
Use of prefixes instead of exponents
Description
In the RedCrab Calculator prefixes can be used instead exponents.
The term 2·103 can be replaced by 2k.
22·10-6 kann durch 22µ ersetzt werden
Before entering a prefix symbol, press the ESC key. Pressing the ESC key marks the following character as a prefix and avoids conflicts with variable names. This also means that the same letters for variables and prefixes can be used on the worksheet. Prefixes are displayed in gray to distinguish them from variables..
Available from version 7.9
Example
Calculation of an impedance according to the formula \(\displaystyle X_C=\frac{1}{2π·f·C}\)
For \(f\) is assumed 2.5 kHz and for \(C\) 22µF.
Calculation with exponents
\(\displaystyle X_C=\frac{1}{2π·2.5·10^3·22·10^{-6}}\)
Calculation with prefixes
\(\displaystyle X_C=\frac{1}{2π·2.5k·22µ}\)
List of prefixes
\(\displaystyle X_C=\frac{1}{2π·2.5k·22µ}\)
List of prefixes
The SI prefixes are standardized by the International Bureau of Weights and Measures (IBWM)
The list below shows the prefixes which RedCrab used
| Y | Yotta | 1024 | 1.000.000.000.000.000.000.000.000 | Quadrillion | Septillion | |
| Z | Zetta | 1021 | 1.000.000.000.000.000.000.000 | Trilliarde | Sextillion | |
| E | Exa | 1018 | 1.000.000.000.000.000.000 | Trillion | Quintillion | |
| P | Peta | 1015 | 1.000.000.000.000.000 | Billiarde | Quadrillion | |
| T | Tera | 1012 | 1.000.000.000.000 | Billion | Trillion | |
| G | Giga | 109 | 1.000.000.000 | Milliarde | Billion | |
| M | Mega | 106 | 1.000.000 | Million | ||
| k | Kilo | 103 | 1000 | Thousand | ||
| m | Milli | 10-3 | 0,001 | Thousandth | ||
| μ | Mikro | 10-6 | 0,000.001 | Millionth | ||
| n | Nano | 10-9 | 0,000.000.001 | Milliardth | Billionth | |
| p | Piko | 10-12 | 0,000.000.000.001 | Billionth | Trillionth | |
| f | Femto | 10-15 | 0,000.000.000.000.001 | Billiardth | Quadrillionth | |
| a | Atto | 10-18 | 0,000.000.000.000.000.001 | Trillionth | Quintillionth | |
| z | Zepto | 10-21 | 0,000.000.000.000.000.000.001 | Trilliardth | Sextillionth | |
| y | Yokto | 10-24 | 0,000.000.000.000.000.000.000.001 | Quadrillionth | Septillionrh | |
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Other basic features
| Introduction | |
| Accuracy | CRange and accuracy |
| Expressions | Mathematical expressions |
| StartCalculation | Execute calculation |
| Fraction line | Write a fraction line |
| Square roots | Handling of root symbols |
| Subscript | How to write subscript |
| Superscript | How to write an exponent |
| Greek letters | How to write Greek letters |
| Prefix | Prefixes instead exponents |
| Hex, Oct, Bin | Hex, octal or bin numbers |
| Complex numbers | |
| Implied multiplication | |