32ᘧ࿾17+68ᘧ࿾3怎么用简便方法?

2025-01-08 02:40:02
推荐回答(1个)
回答1:

32×17+68×3
=(30+2)×17+(70-2)×3
=30×17+2×17+70×3-2×3
=510+34+210-6
=748