Observe what happens when you multiply the square root of 2 by powers of 10 under the radical symbol:
See the pattern? On even-numbered powers of 10, the square root of 2 is multiplied by a power of 10; on odd-numbered ones, the square root of 5 is multiplied by 2 multiplied by a power of 10. (To the right of each equal sign, of course!)
Observe what happens when you multiply the square root of 3 by powers of 100 under the radical symbol:
See the pattern of this one? The square root of 3 is multiplied by a power of 10 to the right of each equal sign!
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© Derek Cumberbatch