如题所述
第1个回答 2020-07-03
101*19+101
=101*(19+1)
=(100+1)*20
=100*20+20
=2000+20
=2020本回答被网友采纳
=101*(19+1)
=(100+1)*20
=100*20+20
=2000+20
=2020本回答被网友采纳
第2个回答 2020-07-03
=101×(19+1)
=(100+1)×20
=100×20+1×20
=2000+20
=2020
=(100+1)×20
=100×20+1×20
=2000+20
=2020