# Lattice Multiplication 1.0 is now out

Independent developer Esa Helttula today is pleased to announce the
release of Lattice Multiplication 1.0, an educational math app for
iPhone and iPod touch. The app can be used to teach and study the
ancient lattice multiplication method.

The Ancient Lattice Multiplication Method:
Lattice multiplication is algorithmically equivalent to long
multiplication. A lattice (a grid) guides the calculation. All the
multiplications are done first and then the additions.

Leonardo of Pisa, who is better known as Fibonacci, introduced the
method to Europe in 1202. In his groundbreaking book "Liber Abaci"
Fibonacci presented many algorithms for working with Arabic numerals.
He presented both the current standard long multiplication method and
also an Indian method that he called lattice multiplication, which is
faster and more compact for working with large numbers.

The lattice multiplication is one of the multiplication methods used
in the Everyday Math curriculum, which is a new mathematics curriculum
developed by the University of Chicago School Mathematics Project. In
the United States over 3 million students in 185,000 classrooms are
currently following this new curriculum.

The Lattice Multiplication App:
The Lattice Multiplication app allows the user to solve a lattice
multiplication problem step by step and animates all the steps. In the
steps the user will multiply or add, and the correct answer will fly to
the right place in the lattice. If the user presses the wrong button
the answer will appear above the keyboard but it will not move.

The Lattice Multiplication app has the following settings:
* The multiplicand can have up to 5 digits
* The multiplier can have up to 3 digits
* The current operation for each step can be hidden
* There are 3 different themes: black, gray and gold
* The speed of the animations can be set

The Lattice Multiplication is just a one app in a series of popular
educational math apps for iPhone. Some of my other mathematics apps are
Long Division, Column Addition and Column Subtraction. I have also
several apps that use alternative algorithms for addition and
subtraction.

Device Requirements:
* iPhone and iPod touch
* Requires iPhone OS 3.0 or later
* 0.5 MB

Pricing and Availability:
Lattice Multiplication 1.0 is only \$0.99 (USD) and available worldwide
exclusively through the App Store in the Education category.