1/43+303/8686+90909/434343+13131313/86868686=多少?急求
1/43+303/8686+90909/434343+13131313/86868686=多少?急求
日期:2020-12-17 06:16:34 人气:1
1/43+303/8686+90909/434343+13131313/86868686
=1/43+(101×3)/(43×101)+(10101×9)/(43×10101)+(13×1010101)/(86×1010101)
=1/43+3/43+9/43+13/86
=2/86+6/86+18/86+13/86
=39/86