Question

12．計算2.4×0.6時，先按整數(shù)乘法算出積，再點小數(shù)點；點小數(shù)點時，看兩個因數(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．

Answer 1

分析 根據(jù)小數(shù)乘法的運算方法，可得計算2.4×0.6時，先按整數(shù)乘法算出積，再點小數(shù)點；點小數(shù)點時，看兩個因數(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．

解答 解：計算2.4×0.6時，先按整數(shù)乘法算出積，再點小數(shù)點；點小數(shù)點時，看兩個因數(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．
故答案為：整數(shù)乘法、小數(shù)點、小數(shù)點、兩個因數(shù)、幾、右、幾．

點評 此題主要考查了小數(shù)乘法的運算方法，要熟練掌握．