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### Course: Arithmetic (all content)>Unit 3

Lesson 6: Multiplication: place value and area models

# Lattice multiplication

Sal introduces lattice multiplication. Created by Sal Khan.

## Want to join the conversation?

• Well I see the trick you did there Sal but how does the lattis multiplication work? I mean what is the meaning of lattice multiplication if you don't know how it works. Your the BEST Sal.
• The next video does explain it but here's a brief overview. Each diagonal represents a place value (ones, tens, hundreds, thousands.) Because you have to recognize that there are zeroes at the end adding place value, the place value of the answer goes up, too. (4x3 is obviously more than 40x30.)
• Since this is lattice multiplication, (another way to solve a multiplication problem), is there a way to solve a division problem another way like multiplication? I am very curious.
• I know that this introduction into Lattice Multiplication is meant to show us that there are numerous ways to approach different functions within mathematics, but is lattice multiplication used in or in any way required for completing higher aspects of math such as calculus, trigonometry, etc.? I would just like to know because although I appreciate how interesting it is, I don't really feel like investing the time in watching the videos and practicing it unless it ends up being a basis for higher maths. Thanks in advance for any responses!
• i guess it is just a curious method to do multiplication. i'm from Portugal and i didn't even knew this method until i saw the video.
but i think this isn't going to be useful to you in higher maths, as you'll be using a calculator for advanced problems.
but you really should learn it! it is a fun and easy way to multiply, and you get to teach it to your friends too =))
knowledge is power
• What does lattice translate to? What does it mean?
• The grammatical definition of lattice is:
1. A structure consisting of strips of wood or metal crossed and fastened together with square or diamond-shaped spaces left between.
2. An interlaced structure or pattern resembling grating, grids, grilles, or grates.
• where does the word lattice come from?
• You've probably seen a "lattice" before. It's basically a decorative wall, or fence if you will, made by criss-crossing some materials, usually wood, diagonally across each other. The diagonal lines, or lattices, Sal made are what give this method of multiplication its name!
(1 vote)
• Who discovered lattice multiplication?
• How do I recommend this video to all of my students?
• just say watch this or show to them during class
• This question may have already been asked somewhere, (I don't know for sure) but what does lattice mean?
• A structure consisting of strips of wood or metal crossed and fastened together with square or diamond-shaped spaces left between, used typically as a screen or fence or as a support for climbing plants or Lattice multiplication, also known as gelosia multiplication, sieve multiplication, shabakh, Venetian squares, or the Hindu lattice, is a method of multiplication that uses a lattice to multiply two multi-digit numbers. It is algorithmically the same as regular long multiplication, but it breaks the process into smaller steps, which some practitioners find easier to use.