题目

图书馆的书是五年前的五倍。(fivetimes)   答案：Thereare five times as many books as five years ago in the library.  用多种方法计算下面各题． (1)12×4 12×4 12×4 12×4 =______ =______ =______ =______ =______ =______ =______ =______ (2)18×2 18×2 18×2 18×2 =______ =______ =______ =______ =______ =______ =______ =______ =______ =______ =______ =______