2.8*1.43+0.57请列式计算
问题描述：
2.8*1.43+0.57请列式计算
答
2.8*1.43+0.57
=2.8*(2-0.57)+0.57
=2.8*2-2.8*0.57+0.57
=2.8*2-(2.8-1)*0.57
=5.6-1.8*0.57
=5.6-1.026
=4.574