如题所述
第1个回答 2016-09-04
=(100-1)×121
= 100×121-121
= 12100-121
= 12100-100-21
= 12000-21
= 11979追问
= 100×121-121
= 12100-121
= 12100-100-21
= 12000-21
= 11979追问
那 202*582*58 呢?
简便方法。
追答是202×58吧?
本回答被提问者和网友采纳第2个回答 2021-10-17
99×121
=(100-1)×121
=100×121-121
=12100-121
=11979
=(100-1)×121
=100×121-121
=12100-121
=11979
第3个回答 2016-09-04
121x100-121-1=12100-121
第4个回答 2020-04-10
99x121
=(100-1)x121
=100x121-1x121
=11979
=(100-1)x121
=100x121-1x121
=11979
第5个回答 2023-03-06
(100-1)×121=12100-121=11979