3+13/6+37/12+81/20+151/30+253/42+393/56+577/72+811/90怎样简算?

来源：学生作业帮编辑：拍题作业网作业帮分类：数学作业时间：2024/04/28 19:59:11

3+13/6+37/12+81/20+151/30+253/42+393/56+577/72+811/90
=3+2+1/6+3+1/12+4+1/20+5+1/30+6+1/42+7+1/56+8+1/72+9+1/90
=3+2+3+4+5+6+7+8+9+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90
=3+(2+9)*8/2+1/2*3+1/3*4+1/4*5+1/5*6+1/6*7+1/7*8+1/8*9+1/9*10
=3+44+1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7+1/7-1/8+1/8-1/9+1/9-1/10
=47+1/2-1/10
=47+5/10-1/10
=47+2/5
=47又2/5

3+13/6+37/12+81/20+151/30+253/42+393/56+577/72+811/90怎样简算? 1/6加1/12加1/20加1/30加1/42加1/56加1/72加1/90怎样简算? 数学题7/12-9/20+11/30-13/42+15/56-17/72+19/90怎样做? 怎样简算“1/2+1/6+1/12+1/20+1/30+1/42+1/56” 2/3-5/6+7/12-9/20+11/30-13/42怎样简便计算 7／6＋3／12＋21／20＋31／30＋43／42＋57／56＋73／72＋91／90怎样简便运算 72*56+56*28怎样简算 1/12+1/20+1/30+1/42+1/56+1/72+1/90这道题怎样解 1/2+1/6+1/20+1/30+1/42+1/56+1/72怎样算简便 1+1/2-5/6+7/12-9/20+11/30-13/42+15/56=怎样简便计算 1+13/6+37/12+81/20+151/30+253/42+393/56+577/72【简算】 2分之1+6分之1+12分之1+20分之1+30分之1=?怎样简便怎样算