Wykonaj działania. A) -2¾+(-1½)-(-4½)-[-(-5¼)+(-6⅔)] B) 2-(-3,45)+(-7,15)-(-10,125)-3,425 C)-305+(-4,2)-(-0,8)+(-3¾)-(-12³/₂₀) D) -{-[-(4)-2½]-(-7}+[-(-3,2)-4⅕]+0,75

A) -2¾+(-1½)-(-4½)-[-(-5¼)+(-6⅔)]= -2i3/4-1i2/4+4i2/4-[-(-5i3/12-6i8/12)]= 1/4-[11i11/12] 1/4-11i11/12= 3/12-11i11/12=-11i8/12=-11i2/3 B) 2-(-3,45)+(-7,15)-(-10,125)-3,425= 2+3,45-7,15+10,125-3,425= 15,575-10,575=5 C)-305+(-4,2)-(-0,8)+(-3¾)-(-12³/₂₀)= -305-4,2+0,8-3i3/4+12i3/20= -309,2+0,8-3,75+12,15= -312,95+12,95=-300 D) -{-[-(4)-2½]-(-7}+[-(-3,2)-4⅕]+0,75 = -{-[-6i1/2]+7}+[3,2-4,2]+0,75= -[13i1/2]-1+0,75= -14,5+0,75=-13,75