Thực hiện phép tính.a)dfrac{2}{5}+dfrac{3}{5}:(−dfrac{3}{2})+dfrac{1}{2};b)2dfrac{1}{3}+(−dfrac{1}{3})2−dfrac{3}{2};c)(dfrac{7}{8}−0,25):(dfrac{5}{6}−0,75)2;d)(−0,75)−[(−2)+dfrac{3}{2}]:1,5+(−dfrac{5}{4})
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Thực hiện phép tính.
a)\(\dfrac{2}{5}\)+\(\dfrac{3}{5}\):(−\(\dfrac{3}{2}\))+\(\dfrac{1}{2}\);
b)2\(\dfrac{1}{3}\)+(−\(\dfrac{1}{3}\))2−\(\dfrac{3}{2}\);
c)(\(\dfrac{7}{8}\)−0,25):(\(\dfrac{5}{6}\)−0,75)2;
d)(−0,75)−[(−2)+\(\dfrac{3}{2}\)]:1,5+(−\(\dfrac{5}{4}\))