The GG Network blog — page 4
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A food label, a physics textbook and an electricity bill all measure the same thing — energy — in three different units. One multiplication gets you between any of them.
Car engines, microwaves and air conditioners all measure power — the rate energy moves — but in three incompatible units. Here's the arithmetic that connects them.
Computers count in base 2 and programmers shorthand it in base 16 — the divide-and-remainder method gets you between any two bases by hand.
Roman numerals aren't positional like decimal digits — they're built from seven symbols and a subtraction rule, and that rule is the whole trick.
Your ISP sells speed in bits per second; your download bar shows bytes per second. One division by 8 explains the gap.
Drive makers count in decimal terabytes; your operating system counts in binary tebibytes. Neither number is wrong — they're just not the same unit.
Tire gauges, weather reports and dive tables all use different pressure units — one multiplication through pascals connects any two of them.
Every time unit is a fixed multiple of one second — the only decision is which multiple, and the only risk is a definition of "year" nobody agreed on.
Every speed conversion is the same move — multiply by how many of the target unit fit in one of the source unit. Three constants cover almost every real case.
Every volume unit is a fixed multiple of one liter — once you know the multiple, converting any amount is a single multiplication or division.
Reading the money out to a committee means two separate checks — does income minus expenditure explain the change in balance, and does that match what the bank says.
Mail merge is just find-and-replace repeated once per row of data — the only rule that matters is what happens when a row is missing a value.