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b) 6,51 + ( - 2,775) - 11,125= 6,51- 2,775 - 11,125 = - 7,39
c) - 10/9 + ( - 1/6) + 9 3/4 - ( - 6,25)= -40/36 - 6/36 + 9 27/36 + 6 9/36= - 1 1/9 - 1/6 + 9,34 + 6 1/4=-1 2/18 - 3/18 +15 = - 5/18 + 15= 14 13/18
d) - 9,3 - ( -12 1/5) - (72,8 - ( -13,002))=-9,3+12,2-(72,8+13,002)=-9,3 + 12,2 - 85,805=2,9-85,802= -82,902
Mam nadzieję,że dobrze :)