Perkalian dengan 25 : Menghitung Cepat

Rumus Umum :

A x 25 = A x (100/4) = (A/4) x 100

Contoh :

1 x 25 = (1/4) x 100 = 0,25 x 100 = 25

2 x 25 = (2/4) x 100 = 0,50 x 100 = 50

3 x 25 = (3/4) x 100 = 0,75 x 100 = 75

4 x 25 = (4/4) x 100 = 1+(0/4) x 100 = 100

7 x 25 = (7/4) x 100 = 1+(3/4) x 100 = 175

14 x 25 = (14/4) x 100 = 3+(2/4) x 100 = 350