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-8 + (-3/4):2 = -8 +(-3/4)*1/2 = -8 - 3/8 = - 8 i 3/8
Zadanie 7.
13,5 - (-3,6)*(-1,7) = 13,5 - 6,12 = 7,38
Zadanie 8.
(1 i 3/5 + 1i 2/3) : (-4-1i2/3) = (8/5+5/3) : (-5 2/3) = (24/15+25/15):(-17/3) = 49/15 * (-3/17) = -147/255 = -49/85
Zadanie 9.
(-4,8):(-2) + (-1/2)*4/5 = 2,4 + (-4/10) = 2,4-0,4 = 2
Zadanie 10.'
a) 0,8+(-8,4):a = -2,2
(-8,4):a = -2,2-0,8
(-8,4):a = -3
a = (-8,4):(-3) = 2,8