These sites will help you.
http://www.coolmath4kids.com/times-tables/times-tables-lesson-lattice-multiplication-1.html
http://www.youtube.com/watch?v=cijuPxHgZAA
http://www.basic-mathematics.com/russian-peasant-multiplication.html
http://www.youtube.com/watch?v=L6wYOpjgDZw
Multiply using Lattice Multiplication 23 x 45
379 x 24
379 x 450
Multiply by using the Russian Peasant Method
27 x 79
38 x 126
2 answers
473 x16 in lattice