5.Wykonaj działania : a)1⁷/₈ *(-6)=  h)-2⅜ -¹/₁₂= i)-13,1-2,5= j)17,21-20,03= k)-0,82 *(-0,3)= l)0,75-(1⅔)=   Prosze o 0bliczenia;)

a)1⁷/₈ *(-6) = = 15/8 * (-6) = = -45/4 = = -11 1/4 h)-2⅜ -¹/₁₂ = = -19/8 - 1/12 = = -57/24 - 2/24 = = -59/24 = = -2 11/24 i)-13,1-2,5 = = - 15,6 j)17,21 - 20,03 = = 2,82 k)-0,82 * (-0,3) = = 0,246 l)0,75-(1⅔) = = 3/4 - 5/3 = = 9/12 - 20/12 = = -11/12