六年级数学训练题:分数的计算(一)巩固练习:(1)1/3=1/()+1/()=1/()+1/()(2)1/4=1/()+1/()=1/()+1/()(3)1/5=1/()+1/()=1/()+1/()(4)1/12=1/()+1/()=1/()+1/()六年级数学训练题:分数的计算(二)巩固练习:(1)1/2=1/()+1/()+1/()(2)1/12=1/()+1/()+1/()(3)1/20=1/()+1/()+1/()(4)1/16=1/()+1/()+1/()(5)1/30=1/()+1/()+1/()六年级数学训练题:分数的计算(三)巩固练习:(1)1/1×2+1/2×3+1/3×4+1/4×5+1/5×6+……+1/49×50(2)1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90(3)1-5/6+7/12-9/20+11/30-13/42+15/56-17/72+19/90(4)2/12×14+2/14×16+2/16×18+2/18×20+1/20