並前往https://www.snowmath.com/zh-tw/math/worksheets/%E8%B2%A0%E6%95%B8%E5%88%86%E6%95%B8%E6%8C%87%E6%95%B8%E5%8A%A0%E6%B8%9B%E4%B9%98%E9%99%A4/exponents-arithmetic-negative-fraction-1-20
