Question

351.25×7896.37的積有兩位小數(shù)．

 

． （判斷對(duì)錯(cuò)）

Answer 1

考點(diǎn)：小數(shù)乘法

專題：運(yùn)算順序及法則

分析：根據(jù)小數(shù)乘法的計(jì)算法則，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)．據(jù)此解答．

解答： 解：根據(jù)分析知，積的小數(shù)位數(shù)等于兩個(gè)因數(shù)小數(shù)位數(shù)之和，351.25是兩位小數(shù)，7896.37是兩位小數(shù)．
2+2=4；
所以351.25×7896.37的積是四位小數(shù)．
所以題干的說(shuō)法是錯(cuò)誤的．
故答案為：×．

點(diǎn)評(píng)：此題解答關(guān)鍵是明確：積的小數(shù)位數(shù)等于兩個(gè)因數(shù)小數(shù)位數(shù)之和．