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b) (-3,2)-10\1 ÷20\7=(-3,2) - 10\1* 7\20= (-3,2) -7\2= (-3,2) - 3,5= -6,7
( najpierw robimy dzielenie (10÷2 6\7)
c) 6,75-4,1\5 \ -1\4= 6,75-4,2 \-0,25 =2,55\ -0,25= -10,2
(pierwsze robimy mnożenie(2,25*3)