怎样算简便就怎样算:453+15+85+47=486-57-143 165×89-89×65 4...

2025-03-29 11:51:39
推荐回答(1个)
回答1:

①453+15+85+47
=(453+47)+(15+85)
=500+100
=600;

②486-57-143
=486-(57+143)
=486-200
=286;

③165×89-89×65
=(165-65)×89
=100×89
=8900;
④43×202
=43×200+43×2
=8600+86
=8686;
      
⑤96×101-96
=96×(101-1)
=96×100
=9600;
 
⑥185×38+15×38 
=(185+15)×38
=200×38
=7600.