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5,19+3,46+8,66-10,39 = 6,92
te liczy sa zaokrąglone :)
b)√27+√12+√75-√108 = √9*3+√4*3+√25*3-√36*3=3√3+2√3+5√3-6√3=
=10√3-6√3=4√3
:) pozdrawiam