Werken
1 1/2 + 2 1/2 = 1
1 1/2 + 2 1/2 = 1
1 1/2 + 2 1/2 = 1
1 1/2 + 2 1/2 = 1
1 1/2 + 2 1/2 = 1
1 1/2 + 2 1/2 = 1
1 1/2 + 2 1/2 = 1
1 1/2 + 2 1/2 = 1
1 1/2 + 2 1/2 = 1
1 1/2 + 2 1/2 = 1