第1个回答 2021-08-09
你好此题简便运算方法为53×19+24×19+77×81=(53+24)×19+77×81=77×19+77×81=77×(19+81)=77×100=7700本回答被网友采纳
第2个回答 2021-07-08
53×19+24×19+77×81
=(53+24)×19+77×81
==77×19+77×81
=77×(19+81)
=77×100
=7700
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第3个回答 2021-07-07
=(53十24)Ⅹ19十(77Ⅹ81)
=77X19十77X81
=(19十81)X77
=100Ⅹ77
=7700
第4个回答 2021-07-07
原式=(53+24)×19+77×81
=77×19+77×81
=77×(19+81)
=77×100
=7700
第5个回答 2021-07-07
53×19+24×19+77×81
=19×(53+24)+77×81
=19×77+77×81
=77×(19+81)
=77×100
=7700