1
Speed Grid (-): Fill in each cell by applying the operation to the row and column headers. Row headers: [8, 9, 6, 7], Column headers: [4, 4, 2, 1] =
2
Speed Grid (×): Fill in each cell by applying the operation to the row and column headers. Row headers: [10, 8, 1, 2], Column headers: [5, 4, 5, 9] =