1 文書を見つけるための辞書。

• significant figure, significant digit
• 有効数字
• any digit of a number that is known with certainty; any digit of a number beginning with the leftmost non-zero digit and ending with the rightmost non-zero digit (or a zero considered to be the exact value); "he calculated the answer to four significant figures"
• 確定的に知られている数の桁のいずれか