9002-498 24*0.25*0.3 如何简算

问题描述:

9002-498 24*0.25*0.3 如何简算

9002-498=(9000+2)-(500-2)=(9000-500)+2+2=8500+4=8504
24*0.25*0.3=(6*4)*0.25*3/10=(4*0.25)*6*3/10=1*18/10=1.8