12.5*3.7*0.8 =12.5×0.8×3.7=10×3.7=37；9.6*10.1 =9.6×（10+0.1）=96+0.96=96.96；2.9*0.65+29*0.035=29×（0.065+0.035）=29×0.1=2.9；有帮助记得好评，新问题请重新发帖提问，这里不再回答谢谢
