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A grid search is based upon the amount of area to be searched, and how much area a searcher can see at one time. The grid is divided up into squares as wide as the searcher's capability, and as the searcher(s) move forward, each grid square is scanned. At the end of the row, the searcher(s) move over to the next row, and repeat the search in each grid square.
This is talking about a search grid. When you search for evidence you have to look at an area in detail and to keep track of where you have been and where you need to still examine; you need the grid to know where those parameters are. Also it keeps you from repeatedly searching one area while skipping another and missing something vital.
A six figure grid co-ordinate system is the standard method for maps. This system is used in the Global Positioning System.
When he helped Bella search for the special meadow
To solve 6 x 22 using the grid method, you first break down 22 into its components: 20 and 2. Then, create a grid with one row for 6 and columns for 20 and 2. Multiply: 6 x 20 equals 120, and 6 x 2 equals 12. Finally, add the two products together: 120 + 12 equals 132, so 6 x 22 equals 132.