第4课时含有中括号的三步计算试题
一、计算下面各题。
420÷[（205-198）×4] 540÷[342÷（665÷35）]
320÷[（15+25）×2]
二、5名工人每天能铺600平方米的大理石地面，照这样计算，再增加2名工人，
需要多少天才能铺完1680平方米的大理石地面？
三、张师傅做了11个零件，李师傅做了8个零件，王师傅做的零件个数是张师
傅与王师傅所做零件总数的2倍，何师傅做了114个零件，何师傅做的零件是王师傅的几倍？
答案：一、15 30 4
二、1680÷[600÷5×（5+2）]=2（天）
三、114÷[（11+8）×2]=3
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16:5916:59:028.8.2020Saturday, August 8, 2020