用简便方法计算；1.2.3*3.14-1.2*3.14+8.9*3.14 2.2.56*15+14.4*0.5-0.3*1501.2.3*3.14-1.2*3.14+8.9*3.14 2.2.56*15+14.4*0.5-0.3*150
来源：学生作业帮助网 编辑：六六作业网 时间：2024/12/19 23:42:35
用简便方法计算；1.2.3*3.14-1.2*3.14+8.9*3.142.2.56*15+14.4*0.5-0.3*1501.2.3*3.14-1.2*3.14+8.9*3.142.2.56*15+
用简便方法计算；1.2.3*3.14-1.2*3.14+8.9*3.14 2.2.56*15+14.4*0.5-0.3*1501.2.3*3.14-1.2*3.14+8.9*3.14 2.2.56*15+14.4*0.5-0.3*150
用简便方法计算；1.2.3*3.14-1.2*3.14+8.9*3.14 2.2.56*15+14.4*0.5-0.3*150
1.2.3*3.14-1.2*3.14+8.9*3.14
2.2.56*15+14.4*0.5-0.3*150
用简便方法计算；1.2.3*3.14-1.2*3.14+8.9*3.14 2.2.56*15+14.4*0.5-0.3*1501.2.3*3.14-1.2*3.14+8.9*3.14 2.2.56*15+14.4*0.5-0.3*150
1.2.3*3.14-1.2*3.14+8.9*3.14
= (2.3-1.2+8.9)*3.14
=10*3.14
=31.4
2.2.56*15+14.4*0.5-0.3*150
= 2.56*15+14.4*0.5-0.3*150
= 2.56*15+1.44*5-3*15
= 2.56*15+0.48*15-3*15
= (2.56+0.48-3)*15
= (3.04-3)*15
=0.04*15
=0.6