1.28*2.37-2.8*0.237 这道题怎样简便算?
问题描述：
1.28*2.37-2.8*0.237 这道题怎样简便算?
答
原式=1.28*2.37-2.8/10*10*0.237=1.28*2.37-0.28*2.37=(1.28-0.28)*2.37=2.37
1.28*2.37-2.8*0.237 这道题怎样简便算?
原式=1.28*2.37-2.8/10*10*0.237=1.28*2.37-0.28*2.37=(1.28-0.28)*2.37=2.37