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Lattice Multiplication

It's multiplication, but lattice style.
by

Bryant Luhman

on 17 May 2011

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Transcript of Lattice Multiplication

Lattice Multiplication! Lattice multiplication, also known as sieve multiplication, is equivalent to long multiplication, except easier and faster. Lattice was introduced to Europe in 1202 in Fibonacci's book Liber Abacci. Lattice requires the preparation of a lattice, or grid, which serves as a guide for the calcutions.

Let's see an example. So, the answer to 345 x 12 is 4,140. Now let's do some examples on the board!!! • Step 3: During the multiplication phase, the lattice is filled in with two-digit products of the corresponding digits labeling each row and column: the tens digit goes in the top-left corner. • Step 5: Finally, if a carry phase is necessary, the answer as shown along the left and bottom sides of the lattice is converted to normal form by carrying ten's digits as in long addition or multiplication. • Step 4: During the addition phase, the lattice is summed on the diagonals. • Step 1: Make the lattice based on the number of digits in your two numbers. • Step 2: Fill place your two numbers on the upper and right sides of the lattice
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