2+0.1x0.2+0.2x0.2+0.3x0.3 - 知识问答

2+0.1x0.2+0.2x0.2+0.3x0.3怎么算简便?

2个回答

2+0.1x0.2+0.2x0.2+0.3x0.3
=2+（0.1+0.2）x0.2+0.3x0.3
=2+0.3*0.2+0.3x0.3
=2+0.3x(0.2+0.3)
=2+0.3x0.5
=2+0.15
=2.15

相关问题