Question

0.28x0.45+1.85简便计算

Answer 1

0.28*0.45+1.85=0.28*0.9*0.5+3.7*0.5=0.5*(0.28*0.9+3.7)=0.5*3.952=1.976 16.5-0.65*10.2=16.5-0.65*(10+0.2)=16.5-0.65*10-0.65*0.2=16.5-6.5-0.13=9.87