作业帮简便计算3.86×1.3+0.14×1.3 15.93-8.15-5.39
来源：学生作业帮助网 编辑：作业帮 时间：2024/08/09 15:13:37
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简便计算3.86×1.3+0.14×1.3 15.93-8.15-5.39
简便计算3.86×1.3+0.14×1.3 15.93-8.15-5.39
简便计算3.86×1.3+0.14×1.3 15.93-8.15-5.39
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
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