2. Measure and Problem Solving

Types of numbers

Exact numbers -

  • A number that can be counted or that is given.

13 pens (count) or 1 dozen = 12

Inexact number -

  • A measured volume

Error (Absolute error)

Error vaule = actual vaule - measured value

The answer should include the unit

Percecent Error

% error = actual value - measured value/100 × 100

The answer should include %’