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1、简便计算练习题(1)160+35+165+240 (2)476-121-12(3)25254 (4)10134-34(5)885125 (6)12525528(7)1032-211-121-68 (8)2646+2643+264(9)1115+55599 (10)26(1/37+2/26)37(11)376+727+324+46+473+654参考答案:(1)160+35+165+240 =160+240+35+165 =400+200 =600 (2)476-121-12=476-(121+12)=476-300 =176(3)25254 =25425 =10025 =2500 (4)101
2、34-34 =10134-341 =(101-1)34=3400(5)885125 =812585 =100085 =85000 (6)12525528=125825413 =100010013=1300000(7)1032-211-121-68 =1032-(211+121+68) =1032-400 =632 (8)2646+2643+264=264(6+3+1)=26410=26400(9)1115+55599 =5551+55599 =555(1+99) =555100 =55500(10)26(1/37+2/26)37=2637(1/37+2/26)=2637/37+26372/26=26+60=100(11)376+727+324+46+473+654=376+324+(727+473)+(46+654)=700+1200+700=2600