Question

14．4.45×2.3的積有三位小數(shù)．

Answer 1

分析 根據(jù)小數(shù)乘法的計算法則：先按照整數(shù)乘法的計算法則算出積，再看兩個因數(shù)一共有幾位小數(shù)，就從積的右邊起數(shù)出幾位點上小數(shù)點．或根據(jù)積的小數(shù)位數(shù)等于兩個因數(shù)小數(shù)位數(shù)的之和．由此解答．

解答 解：根據(jù)分析知：
4.45×2.3=10.235，積有三位小數(shù)．
故答案為：三．

點評 此題考查的目的是理解掌握小數(shù)乘法的計算法則，明確：積的小數(shù)位數(shù)等于兩個因數(shù)小數(shù)位數(shù)的之和．