Question

5.04×2.6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)乘法算出積，再因數(shù)中一共有幾位小數(shù)，就從積的右邊起數(shù)出幾位點上小數(shù)點．末尾有0的，根據(jù)小數(shù)的性質把末尾的0去掉．據(jù)此解答．

解答：解：根據(jù)小數(shù)乘法的計算法則可知，積的小數(shù)位數(shù)等于兩個因數(shù)小數(shù)位數(shù)之和．
5.04是兩位小數(shù)，2.6是一位小數(shù)，2+1=3，所以5.04×2.6的積有三位小數(shù)．
故答案為：三．

點評：此題考查的目的是明確：在小數(shù)乘法中，積的小數(shù)位數(shù)等于兩個因數(shù)小數(shù)位數(shù)之和．