数学医院.854﹣136﹣36=854﹣(136﹣36)=854﹣100=754改正:289﹣35+65=289﹣(35+65)=289﹣100=189.改正:
4.56×0.27+483×0.0456+1.9×4.56+0.456×30= .
20.01×314+200.1×31.4+2001×3.14= .
99+11×19+11×80 .
123×5.67+8.77×567= .
80×16×25×125= .