Pencil cut

Veronika cut 10cm pencil. Each turn, the pencil was reduced by 0.2mm. She turned the pencil 100 times. How many centimeters has a pencil now?

Correct result:

x =  8 cm


o=0.2 mm cm=0.2/10  cm=0.02 cm  x=10100 o=10100 0.02=8 cm

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