(0.98*99+0.98)/49 用简便方法做_数学解答

(0.98*99+0.98)/49 用简便方法做

人气：445 ℃　时间：2020-04-14 17:28:38

解答

(0.98*99+0.98)/49
=((1-0.02)*(100-1) + 0.98)/49
=(100 - 2 -1 + 0.02 + 0.98)/49
= (97 + (0.02 + 0.98))/49
=(97 + 1)/49
=98/49
=2