math
posted by mark on .
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

These sites will help you.
http://www.coolmath4kids.com/timestables/timestableslessonlatticemultiplication1.html
http://www.youtube.com/watch?v=cijuPxHgZAA
http://www.basicmathematics.com/russianpeasantmultiplication.html
http://www.youtube.com/watch?v=L6wYOpjgDZw 
473 x16 in lattice