(1)325×45=(2)3367÷67=(3)907×20=(4)906÷78=(要求寫出驗算過程)

解:(1)325×45=14625.
   325
 


(2)3367÷67=50…17.
     50



(3)907×20=18140.
  907


(4)906÷78=11…48
    11

 
  
驗算:
  78



分析:(1)(3)小題根據(jù)三位數(shù)乘兩位數(shù)豎式計算的方法求解,(2)(4)小題根據(jù)除數(shù)是兩位數(shù)的除法豎式計算的方法求解,并根據(jù)乘法驗證除法的方法驗算.
點評:本題考查了三位數(shù)乘兩位數(shù)豎式計算的方法,要把數(shù)位對齊,注意因數(shù)中間和末尾有0的情況.本題還考查了除數(shù)是兩位數(shù)的筆算方法,注意數(shù)位的對齊情況,然后根據(jù)被除數(shù)=除數(shù)×商+余數(shù)進行驗算.
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