Question

2.5x0.99 简便计算怎么算

Answer 1

2.5x0.99 简便计算这么算；
2.5*0.99
=2.5*（1-0.01）
=2.5*1-2.5*0.01
=2.5-0.025
=2.475

Answer 2

2.5×0.99
=2.5×(1-0.01)
=2.5-0.025
=2.475