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B) [(-1/2)-3-(3/4)-2]-1=[(-1 1/3)+1/4]-1=[(-16/12)+3/12]-1=(-1 1/12)-1=-2 1/12
myślę,że dobrze i liczę na naj =D
16/10 x 4/3 + 25 = 48/30 +25 = 26 i 18/30
[(1/2) -12/4 - 3/4 -8/4)] - 1 = [(-1/2) -1/4)] - 1 = - 1 3/4