Skip to main content
00:00
00:00

Why 0.999… Equals 1

A pupil's guess, 0.999… < 1 ?, sits on the board. The teacher multiplies 1/3 = 0.333… by 3 in orange chalk to get 3/3 = 0.999…, wipes the guess in one pass and writes 0.999… = 1 in its place, underlined.

Chalkboard

16:9 · 30fps · 10.0s · en/US

Start from this example

The example keeps its actual drawing version. You review the storyboard before generation is charged.

Example request

Make a 10-second chalkboard short: a pupil guesses that 0.999… is less than 1; the teacher multiplies both sides of 1/3 = 0.333… by 3 to get 3/3 = 0.999…, wipes the guess and writes 0.999… = 1 in the same place.