Tính :
a)\(\frac{0,8\times0,44\times1,25\times25}{10\times125\times4\times25\times8}\) b)\(\frac{13,5\times1420+4,5\times580\times3}{3+6+9+.....+24+27}\)
c)\((1,11+0,19-2.6):(2,06+0,54)-(\frac{1}{2}+\frac{1}{3}):2\)
d)\([2\frac{1}{3}+3,5]:[-4\frac{1}{6}+3\times\frac{1}{7}]+7,5\)
e)\(-15,5\times20,8+3,5\times9,2-15,5\times9,2+3.5\times20,8\)
Giúp mk với , thanks nhiều ạ