Question

Oblicz
1,25*( 3 1/4)*(-8)=
(-5 1/7-9/14):(-1+17/35)=
(-2/3) do potęgi 2 *(-12,3+3,3)do potęgi 2=
(2,5-2 1/3)-(-1/3)do potęgi 3 :2/3=

Answer 1

1,25 *(3 1/4) * (-8) = 1 1/4  * 3 1/4 * (-8) = 5/4 * 13/4 * (-8) = 65/16 *(-8) = 
= 65/2 * (-1) = - 65/2 = -32 1/2

(-5 1/7 - 9/14) : (-1 + 17/35) =
(-5 2/14 - 9/14) : (-35/35 + 17/35) =
(-5 11/14) : (-18/35) =
(-81/14) * (-35/18) =
(-9/2) * (-5/2) = 45/4 = 11 1/4

(-2/3)² * (-12,3 + 3,3)² = 4/9 * (-9)² = 4/9 * 81 = 4/1 * 9/1 = 36 

(2,5 - 2 1/3) - (-1/3)³ : 2/3 = 
(2 1/2 - 2 1/3) - (-1/27) : 2/3 =
(2 3/6 - 2 2/6) - (-1/27) * 3/2 =
1/6 - (-1/9) * 1/2  =
1/6 - (-1/18) =
3/18 + 1/18 = 4/18 = 2/9