1
Speed Grid (×): Fill in each cell by applying the operation to the row and column headers. Row headers: [4, 3, 8, 10], Column headers: [1, 1, 7, 3] =
2
Speed Grid (+): Fill in each cell by applying the operation to the row and column headers. Row headers: [1, 1, 3, 1], Column headers: [3, 5, 7, 8] =