Oblicz. Pamiętaj o kolejności wykonywania działań. a) (3 1/2 + 1 1/2)∙ 3/5 = 3 1/2 + 1 1/2 = ...................... ........ ∙ 3/5 = ............... ...................................... b) (2 2/3 - 4/5) ∙ 1 3/5 = ............∙ 1 3/7 = .............. 2 2/3 - 4/5 = ........................ c) (15 2/3 - 7 1/2) : 1 1/2 = ................................... ................ = ................ ................................ d) 2 ∙ (1/2)²+ 3 ∙ (1/2) = .....................................