Question

\(\frac{-7}{15}.\frac{5}{8}-\frac{2}{8}.\frac{7}{15}+\frac{1}{8}.\frac{-23}{15}\)=?

Answer 1

\(\frac{-7}{15}.\frac{5}{8}-\frac{2}{8}.\frac{7}{15}+\frac{1}{8}.\frac{-23}{15}=\frac{-7}{24}-\frac{7}{60}-\frac{23}{120}=-\frac{3}{5}\)

Answer 2

=-7/24-7/60+-23/120

=(-7/24-7/60)+-23/120

=-49/120+-23/120

=-3/5

tớ bấm máy tính hẳn hoi

Answer 3

\(=\frac{1}{8.15}\left(\left(-7\right).5-2.7+1.\left(-23\right)\right)=\frac{1}{8.15}\left(-35-14-23\right)\)

\(=\frac{1}{8.15}.\left(-72\right)=-\frac{9}{15}=-\frac{3}{5}\)

Answer 4

=-7/24-7/60+-23/120

=(-7/24-7/60)+-23/120

=-49/120+-23/120

=-3/5