Simple calculation method of 1 / 3 * 4 + 1 / 4 * 5 + 1 / 5 * 6 + ······ + 1 / 19 * 20

Simple calculation method of 1 / 3 * 4 + 1 / 4 * 5 + 1 / 5 * 6 + ······ + 1 / 19 * 20

1/3*4+1/4*5+1/5*6+······+1/19*20
=1/3-1/4+1/4-1/5+1/5-1/6+...+1/19-1/20
=1/3-1/20
=17/60

Elden Ring Premiere

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