Tool 5 - The power of Estimation

Transcript

Topic 5 - Concept The Power of Estimation Estimation means A rough but sensible answer enough to check if something makes sense Topic 5 • Concept Air Breathed in a Day 15 breaths / minute F × 1440 minutes 20,000 breaths V x half litre each F = 10,000 litres of air Topic 5 - Concept Rice for a Family ◯ Per person × per day 30 ◯ ◯ 2 tonnes - far too much ◯ Estimation catches silly answers Topic 5 . Concept In Short ◯ Good reasoning over a perfect calculation ◯ A smart estimate shows the right range ◯ Often, that is enough