1.84×(0.3+1.28÷0.16)=1.84×(0.3+0.8)=1.84×1.1=1.84×(1+0.1)=1.84+1.84×0.1=1.84+0.184=2.024
1.84×(0.3+1.28÷0.16)=1.84×(0.3+8)=1.84x8.3=15.272
