5 5×4 20 ------ = ------- = ------- 6 6×4 24
7 7×3 21 ------ = ------- = ------- 8 8×3 = 24
1 1×4 4 ----- = -------- = ----- 3 3×4 12
1 1×1 1 ---- = ------- = ------ 12 12×1 12
9 9×9 81 ----- = -------- = ------ 8 8×9 72
11 11×8 88 ------ = ---------- = ----- 9 9×8 72 |