1. Oblicz: (0,76 : 4/5 - 0,5) : (17/40 - 0,2 : 1 3/5) = (76/100 * 5/4 - 1/2) : (17/40 - 1/5 * 5/8) = = (19/20 - 10/20) : (17/40 - 5/40) = 9/20 : 12/40 = 9/20 * 40/12 = 3/1 * 2/4 = 6/4 = 1 1/2 2. Rozwiąż równania i sprawdź rozwiązania: a) 3,75 * x = 3,9 /:3,75 x = 3,9 : 3,75 x = 39/10 : 15/4 x = 39/10 * 4/15 x = 13/5 * 2/5 x = 26/25 x = 1 1/25 spr L = 3,75 * x = 3 3/4 * 26/25 = 15/4 * 26/25 = 3/2 * 13/5 = 39/10 = 3,9 = P b) 0,0364 : x=10,4 /*x 0,0364 = 10,4x /:10,4 x = 0,0364 : 10,4 x = 364/10000 : 104/10 x = 364/10000 * 10/104 x = 91/1000 * 1/26 x = 91/26000 x = 0,0035 spr. L = 0,0364 : x = 0,0364 : 0,0035 = 364/10000 : 35/10000 = 364/10000 * 10000/35 = = 364/35 = 10 2/5 = 10,4 = P
