簡約 3/13(7-3)+4/13(0.25*3)

解

簡約

\frac{3}{13} \cdot (7 - 3) + \frac{4}{13} \cdot (0.25 \cdot 3)

\frac{15}{13}

十進法表記

1.15384 \dots

解答ステップ

\frac{3}{13} (7 - 3) + \frac{4}{13} (0.25 \cdot 3)

7 - 3 = 4

0.25 \cdot 3 = 0.75

= \frac{3}{13} \cdot 4 + \frac{4}{13} \cdot 0.75

0.75 = \frac{3}{4}

= \frac{3}{13} \cdot 4 + \frac{4}{13} \cdot \frac{3}{4}

\frac{3}{13} \cdot 4 = \frac{12}{13}

\frac{4}{13} \cdot \frac{3}{4} = \frac{3}{13}

= \frac{12}{13} + \frac{3}{13}

\frac{12}{13} + \frac{3}{13} = \frac{15}{13}

= \frac{15}{13}