Before you type a single number into a calculator, you should already have a rough answer in your head how? That is what approximation in calculations is all about: estimating answers before computing them, so you can instantly spot impossible results. Engineers check structural designs this way. Accountants verify spreadsheet totals this way. Even pilots estimate fuel consumption before departure! Today we combine rounding and significant figures to build your mental estimation superpower. Quick challenge before we begin: what is 47 × 52 approximately? Think first then let's verify and explore together!
25/05/2026, 17:35:59
