2.5-1.25-2.5 1.25的简便算法怎么算?

2025-06-26 12:52:10
推荐回答(2个)
回答1:

=2.5-2.5-1.25+1.25
=0-(1.25-1.25)
=0-0
=0

回答2:

原式=2.5-2.5-1.25+1.25
=0-(1.25-1.25)
=0-0
=0