如题所述
第1个回答 2020-07-10
[180+19X(106+74)]÷60
=[180+19X180]÷60
=[180X(19+1)]÷60
=[180X20]÷60
=[180÷60]X20
=3X20
=60本回答被网友采纳
=[180+19X180]÷60
=[180X(19+1)]÷60
=[180X20]÷60
=[180÷60]X20
=3X20
=60本回答被网友采纳
第2个回答 2020-07-10
[180+19×(106+74)]÷60
=[180+19×180]÷60
=[180+3420]÷60
=3600÷60
=60
=[180+19×180]÷60
=[180+3420]÷60
=3600÷60
=60
第3个回答 2020-07-10
[180+19×(106+74)]÷60
=[180+19×180]÷60
=20×180÷60
=20×3
=60
=[180+19×180]÷60
=20×180÷60
=20×3
=60
第4个回答 2020-07-10
=[180+19×180]÷60
=3600÷60
=60
=3600÷60
=60