Odpowiedzi

2010-04-06T17:08:15+02:00
(-½)² - 1,25 × (- ⅔) : 2,5

¼ - 1 ¼ × (- ⅔) : 2 ½= -1 × (-⅔) : 2 ½= ⅔ : 5/2 = 2/3 × 2/5 = 4/15


2,75 × (- 1 1/3) + (-2,8)
2 3/4 × (-1 1/3) + (-2 4/5)= 11/4×(-4/3)+ (-2 4/5) = - 11/3 - 2 4/5 = -3,6-2,8 = -6,4