Question

[Mai gia bảo]

Bài 2: (Đề1) Tính

\(4\dfrac{2}{3}+3\dfrac{2}{7}\)=..........................

\(8\dfrac{5}{9}:5\dfrac{1}{2}\) =..........................

\(6\dfrac{5}{7}:2\dfrac{1}{6}\) =..........................    

\(1\dfrac{3}{4}x2\dfrac{5}{6}\) =..........................

\(5\dfrac{3}{4}-2\) =..........................

Answer 1

[Nguyễn Đức Trí]

\(4\dfrac{2}{3}+3\dfrac{2}{7}=\dfrac{14}{3}+\dfrac{23}{7}=\dfrac{14x7+23x3}{21}=\dfrac{167}{21}\)

\(8\dfrac{5}{9}:5\dfrac{1}{2}=\dfrac{77}{9}:\dfrac{11}{2}=\dfrac{77}{9}x\dfrac{2}{11}=\dfrac{14}{9}\)

\(6\dfrac{5}{7}:2\dfrac{1}{6}=\dfrac{47}{7}:\dfrac{13}{6}=\dfrac{47}{7}x\dfrac{6}{13}=\dfrac{282}{91}\)

\(1\dfrac{3}{4}x2\dfrac{5}{6}=\dfrac{7}{4}x\dfrac{17}{6}=\dfrac{119}{24}\)

\(5\dfrac{3}{4}-2=\dfrac{23}{4}-2=\dfrac{23}{4}-\dfrac{8}{4}=\dfrac{15}{4}\)