Simple calculation process of 1.8 × 0.62 + 0.18 × 3.9-0.018

Simple calculation process of 1.8 × 0.62 + 0.18 × 3.9-0.018


Glad to answer for you!
Firstly, the common factor is decomposed, and then the common factor is extracted;
1.8=100*0.018; 0.18=10*0.018
100*0.62*0.018+10*0.018*3.9-0.018
0.018*(62+39-1)=0.018*100=1.8
I hope my answer is useful to you!