3.7x2.56-2.3=3.7x（2+0.5+0.06）-2.3=3.7x2+3.7x0.5+3.7x0.06-2.3=7.4+1.85+0.222-2.3=7.4-2.3+2.072=5.1+2.072=7.172谢谢，请采纳
3.7×2.56×2.3=94.72-2.3=92.42谢谢采纳
