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问题: 请问这道小学数学题的简便方法

1/2+5/6+11/12+19/20+41/42+...+9701/9702+9899/9900

解答:

1/2+5/6+11/12+19/20+41/42+...+9701/9702+9899/9900
=99 -[(1 -1/2)+(1 -5/6)+(1 -11/12)+...+(1 -9899/9900)]
=99 -[(1/1 -1/2)+(1/2 -1/3)+(1/3 -1/4)+...+(1/99 -1/100)]
=99 -(1 -1/100)
=9801/100