Question

用简便计算:10.1*27 13.7*6.1+3.9*13.7 87.5*0.05*2

Answer 1

10.1*27 =10*27+0.1*27=270+2.7=272.7

.

13.7*6.1+3.9*13.7 =13.7*(6.1+3.9)=13.7*10=137

.

87.5*0.05*2=87.5*0.1=8.75