能简便的用简便方法计算. 6.28*3.7+62.8*0.63 = 5/7+1/3*9+4/13 =_数学解答

能简便的用简便方法计算. 6.28*3.7+62.8*0.63 = 5/7+1/3*9+4/13 =

人气：235 ℃　时间：2020-04-04 07:47:08

解答

原式=6.28*3.7+6.28*10*0.63=6.28（3.7*10*0.63）=6.28*10=62.8
原式=5/7+3+4/13= 3+45/91+28/91=3又73/91