basic 1 min read
Conversion tables and charts
It is often necessary to make calculations from various conversion tables and charts. Examples include currency exchange rates, imperial to…
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Use of calculator
The most modern aid to calculations is the pocket-sized electronic calculator. With one of these, calculations can be quickly and…
basic 1 min read
Ratio and proportion
The ratio of one quantity to another is a fraction, and is the number of times one quantity is contained…
basic 1 min read
Order of precedence and brackets
When a particular arithmetic operation is to be performed first, the numbers and the operator(s) are placed in brackets. Thus…
basic 1 min read
Highest common factors and lowest common multiples
When two or more numbers are multiplied together, the individual numbers are called factors. Thus a factor is a number…