解:=8.9×(1+0.01)=8.9×1+8.9×0.01=8.9+0.089=8.989希望你能采纳
8.9×1.01=8.9×(1+0.01)=8.9×1+8.9×0.01=8.9+0.089=8.989
8.9x1.01=8.9x(1+0.01)=8.9x1+8.9x0.01=8.9+0.089=8.989
8.9x1.01=8.9x(1+0.01)=8.9+0.089=8.989