简便算法:1.6乘百分之45+2乘百分之4.5+0.12乘4.5
问题描述:
简便算法:1.6乘百分之45+2乘百分之4.5+0.12乘4.5
答
1.6*45%+2*4.5%+0.12*4.5
=1.6*0.45+2*0.045+0.12*4.5
=1.6*0.45+0.2*0.45+1.2*0.45
=0.45(1.6+0.2+1.2)
=0.45*3
=1.35
答
1.6乘百分之45+2乘百分之4.5+0.12乘4.5
=1.6*45%+0.2*45%+45%*1.2
=(1.6+0.2+1.2)*45%
=1.35