解:根据题意,已知被除数为1,商为0.98,求除数是多少,用除法。即列式1÷0.98=1ⅹ1/0.98=1x100/98=50/49=1又1/49≈1.02
1÷0.98=lx100/98=50/49l除以50/49等于0.98
1÷0.98=100÷98=50÷49=50/49,所以,1÷50/49=0.981除以50/49等于0.98