1
Speed Grid (+): Fill in each cell by applying the operation to the row and column headers. Row headers: [3, 4, 2, 3], Column headers: [5, 10, 9, 6] =
2
Speed Grid (×): Fill in each cell by applying the operation to the row and column headers. Row headers: [1, 9, 5, 2], Column headers: [8, 10, 8, 10] =