$-6,8-(-15,8) = $  

$-21+(-22) = $  

$-4,5+(-5,5) = $  

$K = 8\times(-3)- 8 \times (-9) =$

$S = 10\times(-3)- 4 \times (-4) =$

$G = 16-4\times(-9) =$

$C = 18-10\times 6 + 12 =$

$P = (3-5)\times(4-5) =$

$-9+7 = $  

$-7-16 = $  

$(-0,1)\times(-2) = $

$5\times(-4) = $

$-14,6-8,4 = $  

$14-16 = $  

$33\times(-5) = $

$(-7)\times 6 = $

$F = 14+8\times(-9) =$

$-2,5+16,1 = $  

$-18-(-11) = $  

$(-4)\times(-1,5) = $