解:65x27-27x35等于( 810 ) ∵已知需求出65x27-27x35等于多少 X × Y - X × Z = X × (Y - Z) ∴65 x 27 - 27 x 35 = 27 × (65 - 35) = 27 × 30 = 810 答:65x27-27x35等于810
27*307*30