Wie geht der 9000er Trick?

9er-Trick2 • 9 = 10 – 1 + 10 – 1 = 2 mal 10 – 2 = 20 – 2 = 18.3 • 9 = 10 – 1 + 10 – 1 + 10 – 1 = 3 mal 10 – 3 = 30 – 3 = 27.4 • 9 = 10 – 1 + 10 – 1 + 10 – 1 + 10 – 1 = 4 mal 10 – 4 = 40 – 4 = 36.5 • 9 = 10 – 1 + 10 – 1 + 10 – 1 + 10 – 1 + 10 – 1 = 5 mal 10 – 5 = 50 – 5 = 45.More items…