Question

絕對(duì)值是

1

3

的數(shù)是

1

3

或-

1

3

．

Answer 1

分析：利用互為相反數(shù)的兩個(gè)數(shù)的絕對(duì)值相等，所以絕對(duì)值是

1

3

的數(shù)是

1

3

或-

1

3

．

解答：解：根據(jù)絕對(duì)值的意義，得絕對(duì)值是

1

3

的數(shù)是±

1

3

．
故答案為：

1

3

或-

1

3

．

點(diǎn)評(píng)：本題考查了絕對(duì)值的意義．注意：絕對(duì)值等于一個(gè)正數(shù)的數(shù)有兩個(gè)，即一對(duì)相反數(shù)．