速算题3题
问题描述：
速算题3题
238÷238 238/239
41 1/3*3/4+51 1/4*4/5+61 1/5*56-5/6
3.6*31.4+43.9*6.4
答
238÷238+238/239=1+238/239=477/23941+1/3*3/4+51+1/4*4/5+61+1/5*5/6-5/6 =41+1/4+51+1/5+61+(1/5-1)*5/6=41+1/4+51+1/5+61-2/3=41+51+61+1/4+1/5-2/3=153+(15+12-40)/60=153-13/60=(9180-13)/60=9167/603.6*31.4+...