Every story.

Evaluation of formulae

Conversion tables and charts

It is often necessary to make calculations from various conversion tables and charts. Examples include currency exchange rates, imperial to…

Use of calculator

The most modern aid to calculations is the pocket-sized electronic calculator. With one of these, calculations can be quickly and…

Calculations and evaluation of formulae

Errors and approximations

Engineering notation and common prefixes

Standard form

Worked problems on standard form

Indices, standard form and engineering notation

Indices Worked problems on indices

Percentages

Decimals

Ratio and proportion

The ratio of one quantity to another is a fraction, and is the number of times one quantity is contained…

Fractions, decimals and percentages

Fractions

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…