1.28*2.37-2.8*0.237 这道题怎样简便算?

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1.28*2.37-2.8*0.237这道题怎样简便算?1.28*2.37-2.8*0.237这道题怎样简便算?1.28*2.37-2.8*0.237这道题怎样简便算?原式=1.28*2.37-2.8

1.28*2.37-2.8*0.237 这道题怎样简便算?
1.28*2.37-2.8*0.237 这道题怎样简便算?

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

1.28*2.37-2.8*0.237
=1*2.37+0.28*2.37-2.8*0.237
=2.37+2.8*0.237-2.8*0.237
=2.37