roziwąż / kreska ułamkowa , *- mnożenie 1. 1/5+(0,8)*1i 1/4-0,2 = 2.[-0,5*3:(-1/2):(-0,1)]:(-60)= 3.-4,75:2i1/9*(-2/9)= 4.[-2,5-(-1/4)]:(-1,5)= 5.-0,81:9/10+5*0,48= 6.144:[1-+(-1/4-3,75):2]:(-3-15)=
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1. 1/5+(0,8)*1i 1/4-0,2 = 1/5 + 8/10*5/4 - 2/10 = 1/5 + 1 - 2/10 = 2/10 + 1 - 2/10 = 1
2.[-0,5*3:(-1/2):(-0,1)]:(-60)=[ -5/10 * 3 * (-2) * (-10) ] : (-60) = -30 : (-60) = 1/2
3.-4,75:2i1/9*(-2/9)=- 4,75 : 19/9 * (-2/9) = -4,75 : (-38/81) = -475/100 * (-81/38) = 38475/3800
4.[-2,5-(-1/4)]:(-1,5)=(-10/4+ 1/4) : (-3/2) = - 9/4 * (-2/3) = 6/4
5.-0,81:9/10+5*0,48=-81/100 * 10/9 + 2,4 = -0.9 +2,4 = 1,5