A scientist measures a bacterium as 0.0000034 metres. A student writes this as 3.4 × 10⁻⁶ m. Who communicated it better and why? Significant figures are the art of communicating precision knowing exactly which digits in a number truly carry information and which are merely placeholders. Used in chemistry, physics, engineering, and medicine, this skill separates careful, precise thinkers from careless ones. Today we unlock the rules for counting and rounding to significant figures, so every number you write means exactly what you intend. Ready to think like a scientist? Let's count what actually counts!
10/06/2026, 06:53:23
