(1)100-36.6-63.4 =100-(36.6+63.4) =100-100 =0 (2)芹森含0.25×13.7×0.4 =0.25×0.4×13.7 =0.1×13.7 =1.37 (3)32.7×28+7.3×28 =(32.7+7.3)春喊×28 =40×28 =1120 (4)1.83+85+98.17+15 =(1.83+98.17)+(85+15) =100+100 =200 (5)0.98×105 =0.98×(100+5) =0.98×100+0.98×5 =98+4.9 =102.9 (6)嫌笑6.15×9.4-42 =57.81-42 =15.81 |