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