Selasa, 16 Februari 2010

Perkalian dengan 3 : Menghitung Cepat

1 x 3 = 3 = 1 + 2 = 1 + 1.2
2 x 3 = 6 = 2 + 4 = 2 + 2.2
3 x 3 = 9 = 3 + 6 = 3 + 3.2

4 x 3 = 12 = 4 + 8 0= 4 + 4.2
5 x 3 = 15 = 5 + 10 = 5 + 5.2
6 x 3 = 18 = 6 + 12 = 6 + 6.2
7 x 3 = 21 = 7 + 14 = 7 + 7.2
8 x 3 = 24 = 8 + 16 = 8 + 8.2
9 x 3 = 27 = 9 + 18 = 9 + 9.2

Rumus Umum :

1. XYZ x 3 = XYZ + XYZ + XYZ
2. XYZ x 3 = 3.X3.Y3.Z

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