1
Speed Grid (×): Fill in each cell by applying the operation to the row and column headers. Row headers: [4, 7, 5, 10], Column headers: [5, 5, 1, 9] =
2
Speed Grid (-): Fill in each cell by applying the operation to the row and column headers. Row headers: [1, 4, 1, 2], Column headers: [8, 2, 3, 2] =