摘要：已知lg2＝0.3010.lg3＝0.4771.求下列各对数的值 lg4 (3)lg12 (4)lg (5)lg (6)lg32 解:(1)lg6＝lg2+lg3＝0.3010+0.4771＝0.7781 (2) lg4＝2lg2＝2×0.3010＝0.6020 ＝lg3+2lg2＝0.4771+0.3010×2＝1.0791 (4) lg ＝lg3-lg2＝0.4771-0.3010＝0.1761 (5) lg ＝ lg3=×0.4771＝0.2386 (6) lg32＝5lg2＝5×0.3010＝1.5050

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