Find the rule 8,6,4,2,0, - 2 | Math enthusiast | Mathematical art

Find the rule 8,6,4,2,0, - 2

Minus 2 at a time

A simple calculation of 3:10:1 + 3:100:11 + 3:1000:111 + 3:10000:1111

Original problem = 4 * 3 + 1 / 10 + 11 / 100 + 111 / 1000 + 1111 / 10000 = 12 + 0.1 + 0.11 + 0.111 + 0.1111 = 12.4321

According to calculation, the thickness of 10000 sheets of paper is about 1 meter. Can you calculate the thickness of 1000 sheets of paper, 100 sheets of paper and 10 sheets of paper according to the thickness of 10000 sheets of paper?
Formula

This is very simple. The thickness of 10000 sheets of paper is about 1 meter, so the average thickness of each sheet of paper is 1 / 10000 = 0.0001 meters, then the thickness of 1000 sheets of paper is 1000 × 1 / 10000 = 0.1 meters, the thickness of 100 sheets of paper is 100 × 1 / 10000 = 0.01 meters, and the thickness of 10 sheets of paper is 10 × 1 / 10000 = 0.001 meters

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Find the rule 8,6,4,2,0, - 2