(lg√2+lg3-lg√10)÷lg1.8

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(lg√2+lg3-lg√10)÷lg1.8(lg√2+lg3-lg√10)÷lg1.8(lg√2+lg3-lg√10)÷lg1.8(lg√2+lg3-lg√10)÷lg1.8=(1/2)(lg2+l

(lg√2+lg3-lg√10)÷lg1.8
(lg√2+lg3-lg√10)÷lg1.8

(lg√2+lg3-lg√10)÷lg1.8
(lg√2+lg3-lg√10)÷lg1.8
=(1/2)(lg2+lg9-lg10)÷lg1.8
=(1/2)lg1.8÷lg1.8
=1/2

(lg√2+lg3-lg√10)/lg1.8
=[lg(√2*3)-1/2]/(lg18-lg10)
=[(lg18)/2-1/2]/(lg18-1)
=1/2

(lg√2+lg3-lg√10)÷lg1.8
=(1/2)(lg2+lg9-lg10)÷lg1.8
=(1/2)lg1.8÷lg1.8
=1/2