1
Speed Grid (×): Fill in each cell by applying the operation to the row and column headers. Row headers: [4, 7, 2, 3], Column headers: [1, 4, 5, 8] =
2
Speed Grid (+): Fill in each cell by applying the operation to the row and column headers. Row headers: [8, 3, 9, 6], Column headers: [2, 7, 8, 3] =