5年级分数计算题
计算5/4-9/20+11/30-13/42+15/56-17/72+19/90
5/4-9/20+11/30-13/42+15/56-17/72+19/90 =(1+1/4)-(1/4+1/5)+(1/5+1/6)-(1/6+1/7)+(1/7+1/8)-(1/8+1/9)+(1/9+1/10 ) =1+1/10 =11/10
原式=1+1/4-1/4-1/5+1/5+1/6-1/6-1/7+1/7+1/8-1/8-1/9+1/9+1/10 =1+1/10 =11/10
答:11∕12+5∕8+3∕8+1∕12 =(11∕12+1∕12)+(5∕8+3∕8) =1+1 =2详情>>
答:有点小氧巴啦详情>>