1
Speed Grid (×): Fill in each cell by applying the operation to the row and column headers. Row headers: [3, 2, 9, 4], Column headers: [9, 4, 1, 7] =
2
Speed Grid (+): Fill in each cell by applying the operation to the row and column headers. Row headers: [6, 1, 4, 8], Column headers: [10, 2, 6, 6] =