aftrekken-beneden-5
Voorbeeld:
1-1= = 0 2-2= = 0 2-1= = 1 3-3= = 0 3-2= = 1 3-1= = 2 4-4= = 0 4-3= = 1 4-2= = 2 4-1= = 3 5-5= = 0 5-4= = 1 5-3= = 2 5-2= = 3 5-1= = 4
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Teach2000
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