80.45减去括号25.6-14.9括住怎样简便计算？

Question

如题所述

Answer 1

解：80.45-(25.6-14.9)
=80.45-25.6+14.9
=80-25+14+(0.45+0.9-0.6)
=69+(0.45+0.3)
=69+0.75
=69.75本回答被网友采纳

Answer 2

见图

Answer 3

可以去掉括号计算
原式＝80.45-25.6+14.9
＝54.85+14.9
＝69.75