题目内容
0.01+0.02+0.03+…+1.
分析:利用高斯求和法,0.01+1=1.01,0.02+0.99=1.01,0.03+0.98=1.01…0.5+0.51=1.01,共有100÷2=50对,用1.01乘50,即可得解.
解答:解:0.01+0.02+0.03+…+1,
=(0.01+1)×50,
=1.01×50,
=50.5.
=(0.01+1)×50,
=1.01×50,
=50.5.
点评:认真观察,根据数字特点进行组合,从而达到巧算的目的.
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