0.11+0.13+0.15+……+0.97+0.99=

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0.11+0.13+0.15+……+0.97+0.99=0.11+0.13+0.15+……+0.97+0.99=0.11+0.13+0.15+……+0.97+0.99=原式=((0.11+0.99)*

0.11+0.13+0.15+……+0.97+0.99=
0.11+0.13+0.15+……+0.97+0.99=

0.11+0.13+0.15+……+0.97+0.99=
原式=((0.11+0.99)*44)/2
=24.2

0.11+0.13+0.15+.......+0.97+0.99
=(0.11+0.99)*44\2
=1.1*44\2
=48.4\2
=24.2

0.11+0.13+0.15+……+0.97+0.99
=100(0.11+0.13+0.15+……+0.97+0.99)/100
=(11+13+15+......97+99)/100
=((1+3+5+7+9+11+13+15+......97+99)-(1+3+5+7+9))/100
=(n(n+1)/2-n(n+1))/2/100
=(99*(99+1)/2-9*(9+1)/2)/100
=(99*100/2-9*10/2)/100
=(99*50-9*5)/100
=49.05