Question

Answer 1

\(40.\)

\(a\)) \(S\)

\(b\)) Đ

\(c\)) Đ

\(d\)) \(S\)

Answer 2

\(41.\)

\(a\)) \(1\dfrac{1}{3}+2\dfrac{1}{2}=\dfrac{4}{3}+\dfrac{5}{2}=\dfrac{23}{6}\)

\(b\)) \(3\dfrac{2}{5}-1\dfrac{1}{10}=\dfrac{17}{5}-\dfrac{11}{10}=\dfrac{23}{10}\)

\(c\)) \(3\dfrac{1}{2}.1\dfrac{1}{7}=\dfrac{7}{2}.\dfrac{8}{7}=\dfrac{56}{14}=4\)

\(d\)) \(4\dfrac{1}{6}:2\dfrac{1}{3}=\dfrac{25}{6}:\dfrac{7}{3}=\dfrac{25}{14}\)