化简 2/73/27/11

解答

化简

\frac{2}{7} \cdot \frac{3}{2} \cdot \frac{7}{11}

\frac{3}{11}

十进制

0.27272 \dots

求解步骤

\frac{2}{7} \cdot \frac{3}{2} \cdot \frac{7}{11}

交叉约去公约数:

2

= \frac{3}{7} \cdot \frac{7}{11}

交叉约去公约数:

7

= \frac{3}{11}

(\frac{29.2}{494} \cdot 40.8%) + (\frac{x}{494} \cdot 39.1%) = 10%

4.9 x^{2} + 8.7 x - 25 = 0

x^{2} - 3 x = x - 1

1 - 0.6 L + 0.08 L^{2} = 0

40 = 4 t^{2} + 12 t