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