[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)
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/17 01:42:03
[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)
[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=
[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)
(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.