\(b)\) \(1,6\times2\dfrac{1}{4}-1,6\times3\dfrac{1}{2}\)
\(=1,6\times\dfrac{9}{4}-1,6\times\dfrac{7}{2}\)
\(=1,6\times\left(\dfrac{9}{4}-\dfrac{7}{2}\right)\)
\(=1,6\times\dfrac{-5}{4}\)
\(=-2\)
\(c)\)
\(\dfrac{11}{4}\times\dfrac{-4}{11}-\dfrac{5}{4}:\dfrac{11}{4}\)
\(=\dfrac{11}{4}\times\dfrac{-4}{11}-\dfrac{5}{4}\times\dfrac{4}{11}\)
\(=-1-\dfrac{5}{4}\times\dfrac{4}{11}\)
\(=-1-\dfrac{5}{11}\)
\(=\dfrac{-16}{11}\)
\(b)\) \(1,6\) x \(2\dfrac{1}{4}\) \(-\) \(1,6\) x \(3\dfrac{1}{2}\)
\(= 1,6 \) x \(\dfrac{9}{4}\) \(-\) \(1,6\) x \(\dfrac{7}{2}\)
\(=\) \(1,6\) x \((\)\(\dfrac{9}{4}\) - \(\dfrac{7}{2}\))
\(= -2\)
\(c)\) 11/4 x -4/11 - 5/4 : 11/4
= 11/4 x -4/11 - 5/4 x 4/11
= (-1) - 5/4 x 4/11
= -16/11
@Nae
