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