Why 2 + 3 × 4 is 14, not 20
Operator precedence explained without the jargon, and why some calculators still get it “wrong”.
Blog
Plain-English pieces on the maths behind everyday sums, and how to get the most out of a calculator that keeps your steps.
Why some calculators say 0.1 + 0.2 = 0.30000000000000004
A short, friendly look at how computers store decimals, and how we keep the noise off your screen.
Splitting a bill step by step, without starting over
A worked example: a shared dinner, a voucher, a tip, and one person who only had a salad.