解:3/10×1/4×5/9等于( 1/24 ) ∵已知需求出3/10×1/4×5/9等于多少 ∴3/10 × 1/4 × 5/9 = 3/10 × 5/9 × 1/4 = 3/(5×2)× 5/(3×3) × 1/4 = 1/6 × 1/4 = 1/24 答:3/10×1/4×5/9等于1/24
3/10×1/4×5/9=3/10×5/9×1/4=1/6×1/4=1/24