Question

chuyển hỗn số thành phân số 7\(\dfrac{3}{8}\) - 5\(\dfrac{1}{4}\)

Answer 1

\(7\dfrac{3}{8}-5\dfrac{1}{4}=\dfrac{59}{8}-\dfrac{21}{4}=\dfrac{59}{8}-\dfrac{42}{8}=\dfrac{17}{8}\)

Answer 2

\(7\dfrac{3}{8}-5\dfrac{1}{4}=\dfrac{7\times8+3}{8}-\dfrac{5\times4+1}{4}=\dfrac{59}{8}-\dfrac{21}{4}\)\(=\dfrac{59-42}{8}=\dfrac{17}{8}\)