Question

oblicz : x to razy zad1] 1 2/5 - 3 3/4 - 2 3/10= zad2] (1 1/4 - 35/6) x (2 3/5 - 1 3/4) zad 3] 2 1/3 + (1 3/7 - 3 3/5) x (- 7/19) zad 4] (2 3/4 - 3 2/3) : (- 1 1/2} zad5] 3/4 x ( 4 1/5 - 3 2/3) prosze pomocy zadanie do jutra

Answer 1

zad1] 1 2/5 - 3 3/4 - 2 3/10 = 7/5 - 15/4 - 23/10 = 28/20 - 75/20 - 46/20 = -93/20 = -4 13/20

zad2] (1 1/4 - 35/6) x (2 3/5 - 1 3/4) = (5/4 - 70/12) · (13/5 - 7/4) =

         (15/12 - 70/12) · (52/20 - 35/20) = (-55/12) · 17/20 = -187/48 = -3 43/48

zad 3] 2 1/3 + (1 3/7 - 3 3/5) x (- 7/19) = 7/3 + (10/7 - 18/5) · (-7/19) =

          7/3 + (50/35 - 126/35) · (-7/19) = 7/3 - 76/35 · (-7/19) = 7/3 + 4/5 = 35/15 + 12/15 =

          47/15 = 3 2/15

zad 4] (2 3/4 - 3 2/3) : (- 1 1/2) = (11/4 - 11/3) ÷ (-3/2) = (33/12 - 44/12) ÷ (-3/2) =

          (-11/12) · (-2/3) = 11/18

zad5] 3/4 x ( 4 1/5 - 3 2/3) = 3/4 · (21/5 - 11/3) = 3/4 · (63/15 - 55/15) = 3/4 · 8/15 = 2/5