[3又1/4-(0.2+1/3)×3.5](6.05+1/20)简算
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[3又1/4-(0.2+1/3)×3.5](6.05+1/20)简算
答案要正确,蟹蟹.
2 36×234.5+256/25÷2/11110+6543×3又5/3(2/11×13)+(2/13×15)+(2/15×17)+(2/17×19)+(2/19×21)+(1/21)=
3 (7/13)×(5/8)+(2/13)×(7/16)-(1/13)×(3又1/2)=
4 (1+1/1×3)×(1+1/2×4)×……×(1+1/8×10)=
5(1+2/2)×(1+2+3/2+3)×(1+2+3+4/2+3+4)×……×(1+2+……+2001/2+3+……+2001)=
6 36×234.5+256/25÷2/11110+6543×3又5/3=
答案要正确,蟹蟹.
2 36×234.5+256/25÷2/11110+6543×3又5/3(2/11×13)+(2/13×15)+(2/15×17)+(2/17×19)+(2/19×21)+(1/21)=
3 (7/13)×(5/8)+(2/13)×(7/16)-(1/13)×(3又1/2)=
4 (1+1/1×3)×(1+1/2×4)×……×(1+1/8×10)=
5(1+2/2)×(1+2+3/2+3)×(1+2+3+4/2+3+4)×……×(1+2+……+2001/2+3+……+2001)=
6 36×234.5+256/25÷2/11110+6543×3又5/3=
(2/11×13)+(2/13×15)+(2/15×17)+(2/17×19)+(2/19×21)+(1/21)
=1/11-1/13+1/13-1/15+1/15-1/17+1/17-1/19+1/19-1/21+1/21
=1/11;
(7/13)×(5/8)+(2/13)×(7/16)-(1/13)×(3又1/2)
=7/13*5/8+7/13*2/16-1/13*7/2
=7/13*(5/8+2/16-1/2)
=7/13*1/4
=7/52;
(1+1/1×3)×(1+1/2×4)×……×(1+1/8×10)
=2*2*3*3*4*4*5*5*6*6*7*7*8*8*9*9/1*2*3*4*5*6*7*8*3*4*5*6*7*8*9*10
=9/5;
(1+2/2)×(1+2+3/2+3)×(1+2+3+4/2+3+4)×……×(1+2+……+2001/2+3+……+2001)
=6/4*12/10*20/18*(n+1)(n+2)/n(n+3)*...*2001*2002/2000*2003
=(2*3*3*4*4*5*...**2001*2002)/(1*2*3*...*2000*4*5*6*...*2003)
=2001*3/2003
=6003/2003.
=1/11-1/13+1/13-1/15+1/15-1/17+1/17-1/19+1/19-1/21+1/21
=1/11;
(7/13)×(5/8)+(2/13)×(7/16)-(1/13)×(3又1/2)
=7/13*5/8+7/13*2/16-1/13*7/2
=7/13*(5/8+2/16-1/2)
=7/13*1/4
=7/52;
(1+1/1×3)×(1+1/2×4)×……×(1+1/8×10)
=2*2*3*3*4*4*5*5*6*6*7*7*8*8*9*9/1*2*3*4*5*6*7*8*3*4*5*6*7*8*9*10
=9/5;
(1+2/2)×(1+2+3/2+3)×(1+2+3+4/2+3+4)×……×(1+2+……+2001/2+3+……+2001)
=6/4*12/10*20/18*(n+1)(n+2)/n(n+3)*...*2001*2002/2000*2003
=(2*3*3*4*4*5*...**2001*2002)/(1*2*3*...*2000*4*5*6*...*2003)
=2001*3/2003
=6003/2003.
8 又3/4-0.35+(1又1/4+60又13/20)简算
1又2\1+2又6\1+3又12\1+4又20\1+...+20又420\1
1又1/2+2又1/6+3又1/12+4又1/20+5又1/30+6又1/42+7又1/56+8又1/72+9又1/90
1+2又1/6+3又1/13+4又1/20+5又1/30+6又1/42+7又1/56+8又1/72+9又1/90+10又
1又1/2-2又5/6+3又1/12-4又19/20+5又1/30-6又41/42+7又1/56-8又71/72+9又1
1又2\1-2又6\5+3又12\1-4又20\19+5又30\1-6又42\41+7又56\1-8又72\71+9又9
1+2又6/1+3又12/1+4又20/1+5又30/1+6又42/1+7又56/1
5又5分之2+5又2分之1-6.2-3又5分之3 【3又4分之1-(0.2+3分之1)乘3.5】除以(6.05+20分之
[3又1/4-(0.2+1/3)×3.5](6.05+1/20)简算
1+2又1/8+3又1/12+4又1/20+5又1/30-6又1/42+7又1/56+8又1/42+9又1/42
1+2又1/6+3又1/12+4又1/20+5又1/30+6又1/42+7又1/56+8又1/72+9又1/90
1又1/20+2又1/30+3又1/42+4又1/56+5又1/72+6又1/90+7又1/110+8又1/132=?