257+97的简便运算

257+97的简便运算
2025-03-12 20:48:34
推荐回答(4个)
回答1:

257+97=(257-(3))+(97+(3))=254+100=354

回答2:

=257+100-3
=357-3
=354

回答3:

257+100-3
=357-3
=354

回答4:

257+(100-3)
=257+100-3
=357-3
=354