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1、四年級簡便運算復(fù)習(xí)提高四年級簡便運算復(fù)習(xí)提高(t go)訓(xùn)練訓(xùn)練第一頁，共7頁。25+25+25+25+25+25+25+25+25+2525+25+25+25+25+25+25+25+25+2525+25+25+25+25+25+25+25+25+2525+25+25+25+25+25+25+25+25+2525+25+25+25+25+25+25+25+25+2525+25+25+25+25+25+25+25+25+2525+25+25+25+25+25+25+25+25+2525+25+25+25+25+25+25+25+25+2525+25+25+25+25+25+25+25+25+2

2、525+25+25+25+25+25+25+25+25+252525X10025X101=25X(100+1)=25X100+1X25=2500+25=2525第1頁/共7頁第二頁，共7頁。101+101+101+101+101+101+101+101+101+101101+101+101+101+101+101+101+101+101+101101+101+101+101+101(100+1)+(100+1)+(100+1)+ (100+1)+(100+1)+ (100+1)+(100+1)+(100+1)+ (100+1)+ (100+1)(100+1)+(100+1)+(100+1)+

3、(100+1)+(100+1)+ (100+1)+(100+1)+(100+1)+ (100+1)+ (100+1)(100+1)+(100+1)+(100+1)+ (100+1)+(100+1)101X25=(100+1)X25=100X25+1X25=2500+25=2525第2頁/共7頁第三頁，共7頁。25+25+25+25+25+25+25+25+25+2525+25+25+25+25+25+25+25+25+2525+25+25+25+25+25+25+25+25+2525+25+25+25+25+25+2525+25+25+25+25+25+25+25+25+2525+25+25+

4、25+25+25+25+25+25+2525+25+25+25+25+25+25+25+25+2525+25+25+25+25+25+25+25+25+2525+25+25+25+25+25+25+25+25+2525+25+25+25+25+25+25+25+25+25 25+25+2525X3725X63第3頁/共7頁第四頁，共7頁。25+25+25+25+25+25+25+25+25+2525+25+25+25+25+25+25+25+25+2525+25+25+25+25+25+25+25+25+2525+25+25+25+25+25+2525+25+25+25+25+25+25+25

5、+25+2525+25+25+25+25+25+25+25+25+2525+25+25+25+25+25+25+25+25+2525+25+25+25+25+25+25+25+25+2525+25+25+25+25+25+25+25+25+2525+25+25+25+25+25+25+25+25+25 25+25+2525X3725X63 25X37+63X25=25X(37+63)=25X100=2500第4頁/共7頁第五頁，共7頁。25+25+25+25+25+25+25+25+25+2525+25+25+25+25+25+25+25+25+2525+25+25+25+25+25+25+25+25+2525+25+25+25+25+25+25+25+25+2525+25+25+25+25+25+25+25+25+2525+25+25+25+25+25+25+25+25+2525+25+25+25+25+25+25+25+25+2525+25+25+25+25+25+25+25+25+2525+25+25+25+25+25+25+25+25+2525+25+25+25+25+25+25+2

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