1.03.02 Alternative grid method of multiplication.
- The grid is made up of square cells forming rows and columns.
- Each cell is divided into an upper left and lower right section by a diagonal line.
- One number is written horizontally above the grid.
- The other number is written vertically to the right of the grid.
- The digits above each column are then multiplied in turn, with the digits to the right of each row.
- The result of each calculation is written in a cell in the corresponding row and column.
- The "units"" digit is place in the lower right section of the cell and any "tens" digit is written in the upper left.
- When the grid has been completed all the numbers along the same diagonals are added together.
- The units digit of this addition is written outside the grid inline diagonally with the numbers which where added.
- Any tens digits are carried over to be added in the next diagonal, e.g. if the result was 27 the 2 would be carried to the next diagonal.
- Once all the diagonals have been added, the result is formed outside the grid by the digits (going from top to bottom and left to right).
- STEP THROUGH SEVERAL EXAMPLES TO ILLUSTRATE THIS PROCESS.
