Lattice Multiplication Method - A simple way to solve multi-digit multiplication problems.
Multiplication Worksheet -- Lattice Multiplication -- Two-digit by Two-digit (All)
Here's a set of 3 posters that give examples of multi-digit multiplication strategies, including the traditional algorithm, partial products, and lattice.
lattice multiplication: learn how to double digit multiply lattice style!
Using the "backwards Zorro" to solve fraction of a number problems
Worksheets: Lattice Multiplication for Kids. Free!!
Quick Sticks and Lattice Multiplication
Butterfly method for adding and subtracting fractions - https://www.facebook.com/different.solutions.page