Question

Oblicz.
[(2/3)² + 2/3² - (1 1/3)² ] : [2 1/7 : 1 1/2]= ?

Answer 1

Liczymy:  [4/9 + 4/3 - 16/9] : [15/7 : 3/2] = [4/9 + 12/9 - 16/9] : [15/7 x 2/3] = 0 : 10/7 = 0

Answer 2

I zapis

[(2/3)² + (2/3)² - (1 1/3)² ] : [2 1/7 : 1 1/2]=
= [4/9 +4/9 - 16/9] : (15/7 * 2/3) =
= (- 8/9) : 10/7 =
= - 8/9 * 7/10 =
= - 56/90 =
= - 28/45

II zapis

[(2/3)² + 2/3² - (1 1/3)² ] : [2 1/7 : 1 1/2]=
= [4/9 + 2/9 - 16/9] : (15/7 * 2/3) =
= (- 10/9) : 10/7 =
= - 10/9 * 7/10 =
= - 7/9