Jeleppi-vinkki
Esim.
5 ∙ [[$\dfrac{50}{10}$]] = [[$\dfrac{5 ∙50}{10}$]]
= [[$\dfrac{250}{10}$]] = 25
Supistamista käyttäen:
5 ∙ [[$\dfrac{50}{10}^{(10}$]] = 5 ∙ 5 = 25
5 ∙ [[$\dfrac{50}{10}$]] = [[$\dfrac{5 ∙50}{10}$]]
= [[$\dfrac{250}{10}$]] = 25
Supistamista käyttäen:
5 ∙ [[$\dfrac{50}{10}^{(10}$]] = 5 ∙ 5 = 25