解:810÷54等于( 15 ) ∵已知需求出810÷54等于多少 X ÷ Y = Z,即X = Z × Y ∴810 ÷ 54 = 810 × 1/54 = 810/54 = (15×54)/54 = 15 经检验,810 = 15 ×54符合题意 答:810÷54等于15