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2A (tylko pierwsze wyrażenie jest dodatnie, reszta to wyrażenia ujemne)
2.A
A. 5,89 - 4,14 = 1,75
B. (10 - 17) ÷ (19 - 15) = -7/4 = -1 3/4
C. 2 2/3 × (-0,75) = 7/3 × (- 3/4) = -7/4 = -1 3/4
D. 1/2 -(-3/2)² = 1/2 - 9/4 = -7/4 = -1 3/4
B=C=D