Lattice multiplication makes use of the multiplication table in order to multiply huge numbers together quickly and easily. It is thought to have originated in India and moved west into Europe.

Lattice multiplication makes use of the multiplication table in order to multiply huge numbers together quickly and easily. It is thought to have originated in India and moved west into Europe.

So he began incorporating lattice multiplication into his lessons. He was skeptical at first, but he stayed committed and soon the method “spread like a wildfire,” Rush said.