Question

搜集几道有理数运算题不要低于五道就行了

Answer 1

1. 1+2+3+4+.+100000=?

2. 1/1+1/2+1/3+.1/50=?

3. 1+1/2+1/4+1/8+1/16+.1/512=?

4. +3+9+27+81+243+.9999=?

5. 1+1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90=?