First X Significant Numbers

Mar 23, 2009

My values look like:
3.756897
23.4597861
103.459786
82
5.45667891
29.8975316

I need the first three significant numbers:
3.75
23.4
103
82
5.45
29.8

I used the LEFT function for a while until I started getting numbers over 100 and numbers with 0 decimals.

Does Excel have a function that will return the first x significant numbers? No rounding; just the first three numbers.

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