0.01+0.02+0.03+0.04+······+0.99 解题思路

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0.01+0.02+0.03+0.04+······+0.99 解题思路
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0.01+0.02+0.03+0.04+······+0.99 解题思路
0.01+0.02+0.03+0.04+······+0.99 解题思路

0.01+0.02+0.03+0.04+······+0.99 解题思路
等差数列
=(0.01+0.99)X99÷2
=49.5

=(0.01+0.99)+(0.02+0.98)+……+(0.5+0.5)
=1*50
=50

0.01+0.02+0.03+0.04+······+0.99
=(0.01+0.99)*99/2
=49.5