1/8*1/2+0.125*1/2+0.5

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1/8*1/2+0.125*1/2+0.5

1/8*1/2+0.125*1/2+0.5
=1/8*1/2+1/8*1/2+0.5
=1/8*(1/2+1/2)+1/2
=1/8 +4/8
=5/8