⏱ 0.0sM@ms.riveraLv 5#mental-math#multiplication#video🧮 Same tens digit, and the units add to 10 — that unlocks a 2-second trick.Solve all four in order:56×54=56 \times 54 =56×54=23×27=23 \times 27 =23×27=34×36=34 \times 36 =34×36=78×72=78 \times 72 =78×72=Check all