1 2/9 \div 2 1/5

解答

1 \frac{2}{9} \div 2 \frac{1}{5}

\frac{5}{9}

十进制

0.55555 \dots

求解步骤

1 \frac{2}{9} \div 2 \frac{1}{5}

将带分数转换为假分式:

1 \frac{2}{9} = \frac{11}{9}

= \frac{11}{9} \div 2 \frac{1}{5}

将带分数转换为假分式:

2 \frac{1}{5} = \frac{11}{5}

= \frac{11}{9} \div \frac{11}{5}

使用分式法则:

\frac{a}{b} \div \frac{c}{d} = \frac{a}{b} \times \frac{d}{c}

= \frac{11}{9} \times \frac{5}{11}

交叉约分:

11

= \frac{5}{9}

s im pl i f y \frac{1}{3} i - (\frac{1}{4} - \frac{1}{6} i)

s im pl i f y 2 8 x^{3} (3 10 x^{4} - x 5 x^{2})

s im pl i f y (2 x + 1)^{2} + (2 x - 3)^{2} - 8 x (x - 1)

s im pl i f y \frac{87}{100} (\frac{1300}{11}) + 11

s im pl i f y (2^{4} a^{9}) (2^{- 2} a^{- 3})