Question

絕對(duì)值是+3.1的數(shù)是

±3.1

，絕對(duì)值小于2的整數(shù)是

±1和0

．

Answer 1

分析：①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3.1的數(shù)是3.1，-3.1；
②求絕對(duì)值小于2的整數(shù)，即求絕對(duì)值等于0，1的整數(shù)，可以結(jié)合數(shù)軸，得出到原點(diǎn)的距離等于0，1的整數(shù)．

解答：解：①根據(jù)絕對(duì)值的意義，得絕對(duì)值是3.1的數(shù)是±3.1．
故答案為：±3.1；
②根據(jù)絕對(duì)值的定義，則絕對(duì)值小于2的整數(shù)是0，±1，．
故答案為：0，±1．

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)．