Question

11．2.32×0.06的結(jié)果是4位小數(shù)．√（判斷對(duì)錯(cuò)）

Answer 1

分析 根據(jù)小數(shù)乘法的計(jì)算法則，計(jì)算小數(shù)乘法，先按照整數(shù)乘法的計(jì)算法則算出積，再看兩個(gè)因數(shù)一共有幾位小數(shù)，就從積的右邊起數(shù)出幾位點(diǎn)上小數(shù)點(diǎn)．也就是積的小數(shù)位數(shù)等于兩個(gè)因數(shù)小數(shù)位數(shù)之和．據(jù)此判斷．

解答 解：由分析得：積的小數(shù)位數(shù)等于兩個(gè)因數(shù)小數(shù)位數(shù)之和．
2.32是兩位小數(shù)，0.06也是兩位小數(shù)，所以它的積有4位小數(shù)．
因此，2.32×0.06的結(jié)果是4位小數(shù)．這種說(shuō)法是正確的．
故答案為：√．

點(diǎn)評(píng) 此題考查的目的是理解掌握小數(shù)乘法的計(jì)算法則及應(yīng)用，明確：積的小數(shù)位數(shù)等于兩個(gè)因數(shù)小數(shù)位數(shù)之和．