∵lg2=0.3010,lg3=0.4771
∴lg√1.8=½lg1.8
=½lg﹙0.1×2×3²﹚
=½﹙lg0.1+lg2+lg3²﹚
=½﹙lg0.1+lg2+2lg3﹚
=½×﹙-1+0.3010+2×0.4771﹚
=½×0.2552
=0.1276
∵lg2=0.3010,lg3=0.4771
∴lg√1.8=½lg1.8
=½lg﹙0.1×2×3²﹚
=½﹙lg0.1+lg2+lg3²﹚
=½﹙lg0.1+lg2+2lg3﹚
=½×﹙-1+0.3010+2×0.4771﹚
=½×0.2552
=0.1276