Exam Mathematics and Formula-Sheet Skills

Extract the known quantities, required unknown, and units from an electrical exam question.

Convert electrical quantities between base units and common SI-prefixed units.

Evaluate formula-sheet expressions involving fractions, percentages, powers of ten, squares, and roots with a calculator.

Select an appropriate equation from a supplied formula sheet for a stated problem.

Rearrange a three-variable multiplication or division formula to isolate any variable.

Isolate a variable that appears as a squared term in an electrical formula.

Substitute values into a rearranged formula and evaluate the result accurately with a calculator.

Check a calculated answer using units, estimation, and physical reasonableness.