## Elementary Technical Mathematics

We have 4 numbered divisions on the barrel: $4×0.100~in=0.400~in$ We have 1 small division on the barrel: $1×0.025~in=0.025~in$ The head reading is 3: $3×0.001~in=0.003~in$ Thus, the total measurement is: $0.400+0.025+0.003=0.428~in$