Question

(2.5-1÷0.8)×0.8-0.8怎么算简便呢?谢谢

Answer 1

（2.5-1÷0.8）×0.8-0.8=2.5×0.8-1÷0.8×0.8-0.8=2-1-0.8=0.2

Answer 2

（2.5-1÷0.8）*0.8-0.8
=（2.5-1.25）*0.8-0.8
=1.25*0.8-0.8
=1-0.8
=0.2