> 数学 >
用简便方法计算.
(6+18)×125    
89×39+89      41×201
79×33+79×67     57×11        425×101.
人气:349 ℃ 时间:2019-08-19 14:13:07
解答
①(6+18)×125  
=6×125+18×125
=750+2250
=3000;  
②89×39+89  
=89×(39+1)
=89×40
=3560;
   
③41×201
=41×200+41
=8200+41
=8241;
④79×33+79×67
=79×(33+67)
=79×100
=7900;
  
⑤57×11
=57×10+57
=570+57
=627;
⑥425×101
=425×100+425
=42500+425
=42925.
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