Question

【題目】小數(shù)加、減、乘法計(jì)算時(shí),都要將小數(shù)點(diǎn)對(duì)齊。（______）

Answer 1

【答案】錯(cuò)誤

【解析】解：計(jì)算小數(shù)加、減時(shí)要把小數(shù)點(diǎn)對(duì)齊，計(jì)算小數(shù)乘法時(shí)要把末位對(duì)齊；原題說(shuō)法錯(cuò)誤.

故答案為：錯(cuò)誤小數(shù)與小數(shù)相加減，相同數(shù)位對(duì)齊，也就是把小數(shù)點(diǎn)對(duì)齊；計(jì)算小數(shù)乘法時(shí)要把末位對(duì)齊，然后先按照整數(shù)乘法的計(jì)算方法計(jì)算出積再根據(jù)因數(shù)中小數(shù)點(diǎn)的位數(shù)確定積中小數(shù)點(diǎn)的位數(shù).