One Atta Time Flash Cards Distance Learning Create New Sheet Select a Worksheet > Version 1 Version 2 Version 3 Version 4 Version 5 Version 6 Version 7 Version 8 Version 9 Version 10 Grab 'em All 2 Digit × 2 Digit 4nbt5 Multiply two 2-digit numbers using the lattice (grid) method.Break each number into tens and ones to find the smaller partial products.Add the diagonal sums in the lattice to get the final product.