Đề bài

Tính:

a)$0,75 - \frac{5}{6} + 1\frac{1}{2};$                                    

b)$\frac{3}{7} + \frac{4}{{15}} + \left( {\frac{{ - 8}}{{21}}} \right) + \left( { - 0,4} \right);$

c)$0,625 + \left( {\frac{{ - 2}}{7}} \right) + \frac{3}{8} + \left( {\frac{{ - 5}}{7}} \right) + 1\frac{2}{3}$           

d)$\left( { - 3} \right).\left( {\frac{{ - 38}}{{21}}} \right).\left( {\frac{{ - 7}}{6}} \right).\left( { - \frac{3}{{19}}} \right);$

e) $\left( {\frac{{11}}{{18}}:\frac{{22}}{9}} \right).\frac{8}{5};$                                    

g)$\left[ {\left( {\frac{{ - 4}}{5}} \right).\frac{5}{8}} \right]:\left( {\frac{{ - 25}}{{12}}} \right)$