Calculated by a simple method: 4.8*0.25.

=﹙4+0.8﹚×0.25

= 1+0.2

= 1.2

First, break it down and multiply it by an integer. (4.8 is divided into 4+0.8) Secondly, it is easier to calculate, not easy to make mistakes, fast and accurate. (Rounding 4*0.25 and 0.8*0.25) Reducing decimal places and increasing integer places are very important for the accuracy of the final result, so the calculation is also very easy and simple. Furthermore, this method can also be applied to division, such as (2.4/0.25) splitting into (2+0.4)/0.25, which will become simpler and the accuracy will be greatly improved.