Question

積的小數(shù)位數(shù)等于幾個因數(shù)中小數(shù)位數(shù)之積．

×

．（判斷對錯）

Answer 1

分析：小數(shù)乘法的計算方法：按照整數(shù)乘法的法則算出積，再看因數(shù)中一共有幾位小數(shù)，就從得數(shù)的右邊起數(shù)出幾位，點上小數(shù)點；得數(shù)的小數(shù)部分末尾有0，一般要把0去掉進行化簡；據(jù)此判斷得解．

解答：解：因為積的小數(shù)位數(shù)等于幾個因數(shù)中小數(shù)位數(shù)之和，
所以積的小數(shù)位數(shù)等于幾個因數(shù)中小數(shù)位數(shù)之積的說法是錯誤的．
故答案為：×．

點評：此題考查小數(shù)乘法的計算方法的靈活運用，要注意積的小數(shù)位數(shù)等于兩個因數(shù)的小數(shù)位數(shù)之和，而不是之積．