ROUNDSIG
Returns a number rounded to a specified number of significant decimal digits of its normalized floating point notation.
ROUNDSIG( Value; Digits )
Value: the number to be rounded.
Digits: the number of decimal places to round.
Digits must be an integer greater than 0.
「=ROUNDSIG(123.456789; 5)」返回 123.46。
「=ROUNDSIG(0.000123456789; 5)」返回 0.00012346
「=ROUNDSIG(123456789012345; 2)」返回 1.2E14
「=ROUNDSIG(123456789; 4)」返回 123500000 或 123.5E6