Question

9.12*0.72+0.912*2.8怎么简便计算?

把简便计算的过程及结果告诉我.*表示乘号.

Answer 1

9.12*0.72+0.912*10*0.1*2.8
=9.12*0.72+9.12*0.28
9.12(0.72+0.28)=9.12*1=9.12

Answer 2

9.12*0.72+0.912*2.8
=10*0.912*0.72+0.912*2.8
=0.912*7.2+0.912*2.8
=0.912*(7.2+2.8)
=0.912*10
=9.12
是这结果吗?

Answer 3

很简单
后者2.8缩小10倍
9.12*0.72+9.12*0.28=9.12*(0.72+0.28)=9.12