求lg（根号1.8）等于多少

lg根号1.8=(1/2)*lg1.8 =(1/2)*(lg18-lg10) =(1/2)*(lg(2×3×3)-lg10) =(1/2)*(lg2+lg3+lg3-lg10) =(1/2)*(0.3010+0.4771+0.4771-1) = 0.1276