Material Detail

Lattice Multiplication (Gelosia): step by step with practice

Interactive lesson on lattice (gelosia) multiplication. Students place the factors' digits around a grid, split each cell diagonally, and add along the diagonals to get the product. It separates single-digit multiplication from place-value addition. Includes a guided example, a try-it tool with new problems at three difficulty levels, a challenge round and a printable PDF worksheet. Free, no sign-up....

Keywords:: multiplication methods, lattice multiplication, gelosia, arithmetic, history of mathematics, place value

Disciplines:

Mathematics and Statistics / Mathematics / General and Liberal Arts Math / History of Mathematics

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More about this material

Material Type:: Tutorial
Date Added to MERLOT:: October 26, 2026
Date Modified in MERLOT:: October 26, 2026
Author:: Goofer Things
Submitter:: Goofer Things
Primary Audience:: Grade School, Middle School, High School, College General Ed
Technical Format:: PDF, Website

Mobile Compatibility:: Not specified at this time
Technical Requirements:: A modern web browser. Works on desktop, tablet and phone.
Language:: English
Cost Involved:: No
Source Code Available:: No
Creative Commons:: No

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