如果最后的数字是 (999÷1000)
1÷(2÷3)÷(3÷4)÷(4÷5)÷(5÷6)÷(6÷7) ....÷(999÷1000)
=1÷2×3÷3×4÷4×5÷5×6÷6×7 .....999×1000
=1÷2× 1000
=0.5×1000
=500
如果最后的数字是 ...(9999÷10000)
1÷(2÷3)÷(3÷4)÷(4÷5)÷(5÷6)÷(6÷7) ....÷(9999÷10000)
=1÷2×3÷3×4÷4×5÷5×6÷6×7 .....9999×10000
=1÷2× 10000
=0.5×10000
=5000
1/(2/3)=3/2
3/2/(3/4)=4/2
4/2/(4/5)=5/2
...
=1000/2=500
希望对你有帮助