lg(3/2)=lg3-lg2=0.4771-0.3010=0.1761因为lg4=lg2^2=2lg2=2x0.3010=0.6020 所以 lg2.4=lg12/5=lg12-lg5=lg3+lg4-lg10/2=lg3+lg4-(1-lg2)=0.4771+0.6020-1+0.3010=0.3801lg√6=lg6^1/2=1/2lg6=1/2(lg2+lg3)=0.38905...