解:12×23等于( 276 ) ∵已知需求出12×23等于多少 X × Y = Z,即X = Z ÷ Y符合题意 ∴12 × 23 = 12 × (20 + 3) = 12 × 20 + 12 × 3 = 240 + 36 = 276 经检验,12 = 276 ÷ 23符合题意 12×23等于276
解:12×23等于( 276 ) ∵已知需求出12×23等于多少 X × Y = Z,即X = Z ÷ Y符合题意 ∴12 × 23 = 12 × (20 + 3) = 12 × 20 + 12 × 3 = 240 + 36 = 276 经检验,12 = 276 ÷ 23符合题意 12×23等于276