Bài 1:
a) $\frac{5}{8}$ - $\frac{3}{8}$ : ($\frac{-3}{4}$) - $\frac{1}{4}$ · 0
= $\frac{5}{8}$ - ($\frac{-1}{2}$) - 0
= $\frac{5}{8}$ - ($\frac{-1}{2}$)
= $\frac{9}{8}$
b) 2,5 - ($\frac{-16}{2017}^{0}$) + ($\frac{-1}{3}^{2}$) : (-3)
= 2,5 - ($\frac{-16}{2017}^{0}$) + ($\frac{-1}{27}$)
= $\frac{3}{2}$ + ($\frac{-1}{27}$)
= $\frac{79}{54}$
c) ($\frac{2}{99}$ - $\frac{3}{7}$) : $\frac{4}{7}$ + $\frac{7}{4}$ · $\frac{97}{99}$
= $\frac{-283}{693}$ : $\frac{4}{7}$ + $\frac{679}{396}$
= $\frac{-283}{396}$ + $\frac{679}{396}$
= 1
d) $\frac{2016}{2017}$ · (13-13·$\frac{2016}{2017}$) - $\frac{1}{2017}$ : $\frac{2017}{2016}$
= $\frac{2016}{2017}$ · [13·(1-$\frac{2016}{2017}$)] - $\frac{1}{2017}$ · $\frac{2016}{2017}$
= $\frac{2016}{2017}$ · (13·$\frac{1}{2017}$) - $\frac{1}{2017}$ · $\frac{2016}{2017}$
= $\frac{2016}{2017}$ · $\frac{13}{2017}$ - $\frac{1}{2017}$ · $\frac{2016}{2017}$
= 0
Cho mình xin ctrlhn để có động lực ạ!
